Handling Bad Business Practices by a Muslim?

Assalamu alaikum.

I have a concern and wanted to ask how to best Islamically handle the situation. I won't mention names to avoid the sin of gossip/backbiting. I have been the frequent customer of a Muslim-owned business that sells everything from Middle Eastern groceries to Islamic women's clothing to religious texts and also has a small restaurant that serves Middle Eastern cuisine.

The woman who owns and runs the shop has been very nice and helpful but in the more recent visits has more or less abandoned me letting me wait forever while she does things in the back. I figure she simply thinks I'm comfortable and don't need such quick attention. Anyway, I do not go fault finding insha'Allah but gradually started noticing rather hostile behavior from her against her male workers there by yelling, screaming, and swearing at them in various torrents of Arabic, English, and Spanish. I ignored it as I'm not there to tell her how to run her business. I had at a more recent visit ordered a dish and made it very clear I cannot have meat of any kind as I'm a vegetarian and I know she understood me. Regardless, I found beef in the dish and picked it out and pointed it out to her. She insisted that it was some kind of vegetable even though it looked like beef, smelled like beef, and even tasted like beef when I temporarily put it in my mouth before spitting it out. I have also been suspicious that she has been overcharging me because she doesn't specify the pricing on much of the merchandise and I've had to ask her the prices and she punches them in so fast that it looks like I'm getting double charged but then there is no receipt other than the credit card receipt. Again, I try not to "fault find" and as she has been very nice try to overlook such concerns.

Needless to say, I purchased recently two Islamic books and I thumbed through them and they seemed very informative and looked like they were from a reputable publisher. Then when I get home, the second book contained tears in many of the pages and appeared to be a binding and printing issue. I returned with the books and she was uninterested in helping me and had someone else help me and as she had another set of books I just asked if I could switch them out which I did. Now that I have purchased other books from the same publisher I have noticed that these books seemed a bit "off" coming from that publisher. It turned out they had no ISBN numbers, no date or location of print, and just an inside page that referenced an introduction from the publisher. I looked online and saw the same title of the book from that publisher for less than half of what she charged me with a nicer cover and the official logo of the publisher. I considered this to be very suspicious and felt that this went beyond "covering another Muslim's sins" and warranted investigation. So I reached out to the publisher to do some fact finding to see if maybe these were just old copies of the book published in another country. Through this fact finding by me and the publisher, it had been confirmed by them that these books were illegal counterfeits also known as pirated books.

I don't want to burn bridges with the Islamic community here which is small. I don't want to go attacking other Muslims over small things. On the other hand, I feel deep in my heart that given the pattern of issues here that this is not a one-off coincidence and there are some unlawful business practices going on (unlawful as in illegal per the state's laws and illegal according to the shariah).

What would a person do Islamically in such a situation?

Say nothing and accept the loss and treat it as a "buyer beware" experience and move on?
Inform her politely that there is a merchandise problem that has been verified and ask for the funds to be credited back to the card in exchange for returning the books?
Go to the card issuer are file a chargeback and retain the books while the matter is investigated?

I want to do the right thing here. I honestly feel like she is taking advantage of me because I am a new Muslim and may be a bit shy as I'm still relatively new at doing business in the community. I have witnessed her provide on a consistent level better customer service to non-Muslims who come to the restaurant to eat while generally ignoring Muslim customers who need assistance.

Alhamdulillah that Allah (swt) guided me to Islam in spite of the negative behavior of Muslims I have come across. Even recently, the police were nearly called while I was at another Muslim-owned business (a coffee shop) because a Muslim man entered the coffee shop drunk on alcohol and started yelling and screaming at me and getting too physically close to me and making inappropriate sexual advances. He was escorted out by a bunch of brothers in the room.

Subhanallah.