Dua of the oppressed? Will it still work?

When someone got oppressed and they made dua against the person, they were complaining in the past and out of frustration they wanted people to know their oppressor, was evil so they exaggerated and added some things. However once they realized their mistake, they went back and took back the false statements and defended the oppressor's honor. Will this expiate the sin? And will that person dua of oppressed be answered if though they exaggerated? Especially if the oppressed did not restore rights and insists on abusing them

Could someone please be kind enough to respond and give me input?
Thanks

Allah Most Knowing. You and the people involved will know for certain on Judgement Day.

[FONT=&quot]On the authority of Abu Dharr al-Ghifari (may Allah be pleased with him) from the Prophet (ﷺ) is that among the sayings he relates from his Lord (may He be glorified) is that He said:[/FONT]
[FONT=&quot]O My servants, I have forbidden oppression for Myself and have made it forbidden amongst you, so do not oppress one another. O My servants, all of you are astray except for those I have guided, so seek guidance of Me and I shall guide you, O My servants, all of you are hungry except for those I have fed, so seek food of Me and I shall feed you. O My servants, all of you are naked except for those I have clothed, so seek clothing of Me and I shall clothe you. O My servants, you sin by night and by day, and I forgive all sins, so seek forgiveness of Me and I shall forgive you. O My servants, you will not attain harming Me so as to harm Me, and will not attain benefitting Me so as to benefit Me. O My servants, were the first of you and the last of you, the human of you and the jinn of you to be as pious as the most pious heart of any one man of you, that would not increase My kingdom in anything. O My servants, were the first of you and the last of you, the human of you and the jinn of you to be as wicked as the most wicked heart of any one man of you, that would not decrease My kingdom in anything. O My servants, were the first of you and the last of you, the human of you and the jinn of you to rise up in one place and make a request of Me, and were I to give everyone what he requested, that would not decrease what I have, any more that a needle decreases the sea if put into it. O My servants, it is but your deeds that I reckon up for you and then recompense you for, so let him who finds good, praise Allah, and let him who finds other than that, blame no one but himself. It was related by Muslim (also by at-Tirmidhi and Ibn Majah).[/FONT]

Can someone please give me an elaborate response? Please!!! I am worried and need advice. Please actually read my post and address my concern