The nikah is the marriage contract sister. That is all one needs to get married. The function is the celebration which doesn't make a marriage void if it doesn't take place. But in the case of a forced nikah (marriage) the marriage contract is void and can be nullified by an islamic judge. And if the marriage was not consumed, then there is no idah.
Islam gives you permission to remarry, and if your father/mahram refuses to act as wali, you are permitted to appoint a wali. This also has some rules. But you must take one thing at a time sis, and just deal with the problem at hand for now. I know it's a tough situation to be in when your family won't support you, but be patient sis and make lots of dua, especially after tahajjud. This is serious form of oppression. Allah's help will be with you. Don't do anything out of emotion and desperation and insha Allah everything will work out in your favour. I will remember you in my duas.