Product: Money transfer, virtual currency, or money service

PayPal lawsuit On XX/XX/2021 at Approximately XXXX hours, XXXX XXXX called stating frantically that he accidentally sent me money through my PayPal account. I look I into my PayPal account and it did indeed have a balance of {$300.00}. 
At approximately XXXX  hours I sent the money back and that was what I believed was the end of that issue. 
Around 1 week later when I logged into my account I noticed that not only is it in the negative {$300.00} from what I sent XXXX but they are charging me an additional {$15.00} dollars in fees accumulated! When I called in they said that XXXX XXXX cancelled the transaction and that the transaction stating that he was sending me money was pending and they lowered it to {$280.00} to top it off. So not only do they subtract XXXX dollars of what he sent, they are adding a XXXX dollar fee which totals {$30.00} in charges. Whats really frustrating is that you can see that I already corrected this mistake within 15 minutes and that PayPal at the time wasnt doing anything at the time. So I kindly asked them why I am I being attacked and a victim here of being penalized and also if they see that I gave him the money why didnt they just leave it alone or cancel my transaction. 
For some reason they gave me some poor lame excuse that he was able to retract his transaction, but I was NOT ALLOWED TO cancel my Transaction. 
So I am being penalized for doing the right thing and now also they sent me collections and now are attacking my credit! This is outraged and I can not believe I am falling victim to PayPal  manipulating a situation to where they do not only take my Money, but they are now attacking my Credit. This is giving me a ton of frustration and mental anguish and I need someone to help me receive justice for them stealing my money away from me but also attack my credit. 

I cant believe I received a collections letter from XXXX XXXX XXXX XXXX. Account : XXXX Ref : XXXX For a bill of {$310.00} This preposterous is completely unfair, PayPal has done me a great deal of frustration, taking my personal time out of my day, giving me a disservice and a great amount of injustice in treatment causing me to have a lot of mental anguish and stress.

I am a victim of credit fraud and PayPal is treating me like a criminal adding charges and completely discriminated against me when they told me that he could retract his transaction but wouldnt allow me to retract mine if they couldnt or wouldnt have seen that I already fixed the issue and that I already fixed the issue by giving the money back. But if they were going to allow him to retract the transaction, I should have every right to retract mine. Not only do they allow him and reject me. They change the amounts money that was sent by XXXX XXXX from {$300.00} to {$280.00} for some reason And Added this to my negative balance as that if I owed more for. {$300.00} to {$310.00} I am seeking for justice and now I am seeking reimbursement and restitution for the damages to my credit and for my mental anguish, stress, pain and Anxiety. 

I am looking to hold PayPal accountable for credit fraud for this was never owed to them and discrimination for allowing him to get away with not only retracting his transaction to crediting my account but then changing the amounts when I complained. This is unjust and I need help. 

Thank you, XXXX XXXX Cell : XXXX Email : XXXX XXXX