Product: Debt collection

I had terminated my lease early with XXXX XXXX XXXX  under XXXX in XX/XX/XXXX. In XXXX of XXXX, I spoke with XXXX XXXX who was the property manager at the time because I received two bill amounts for my move out fee : {$760.00} and {$3800.00}. I asked XXXX  what was the true amount I owed and she confirmed that it was {$3800.00}. I just wanted to make sure because I didnt want to make sure that I didnt pay less than what I was actually supposed to pay. On XX/XX/XXXX, XXXX and I signed a payment arrangement agreement for the move out closing balance of {$3800.00}. On that same day, I have XXXX XXXX a check for {$2600.00}. The agreement reflected this as well, stating that the remaining balance of {$1200.00} must be paid in full twelve months from XX/XX/XXXX. In XX/XX/XXXX, through the CA COVID Rent Relief program that I was approved for, a payment of {$1200.00} was issued to XXXX XXXX . Per the agreement, I my balance was paid in full. 

Come XX/XX/XXXX, I received an email from Genesis notifying me that I was submitted to collections for the {$760.00}. I called Genesis on XX/XX/XXXX to inquire about the collection. I spoke with a lady on a recorded line and explained my situation. One of the first things she told me was that XXXX XXXX  was unable to contact me via mail because they did not have my forwarding address. I told her that it was false because I gave my forwarding address in writing and in person to the management. After I explained to her what the agreement entailed, she told me that bottom line I needed to pay the {$760.00} or it will be reflected on my credit. I then told her how that was possible if I had already paid my debt. She proceeded to raise her voice at me. I reiterated that I had made the initial payment of {$2600.00} and that the balance was {$1200.00}. Before I had the chance to finish my statement that the {$1200.00} was covered through CA COVID Tent Relief, she threw out the statement that I was arguing that I wanted to pay more than what was reported to them. She further grew frustrated, and when I told her once again that the {$1200.00} was already paid in full, she rudely said why I didnt tell her that to begin with? I told her that I communicated with her multiple times and she disagreed with me. She wanted to make further false statements on my behalf in the recorded line and I stopped her, in which she told me I am done with you. I told her to transfer me to her manager, but she hung up the call on me. I called the number back and asked to speak with the manager on my case since the representative was rude. The manager I spoke with was equally awful. I explained the situation to the manager, but he said that I was severely delinquent and needed to pay up. I tried to explain the situation multiple times, only for him to cut me off every single time to say, You already told me that! and never letting me finish my statement in full. After I told him I had documentation of everything, he provided me the email address to submit the documentation. I have already done so and no one has gotten back to me. I need help with this especially since I paid my dues in full back in XXXX. 

I believe Genesis is using intimidation tactics to have me pay a debt I do not owe. I also believe that there were no proper collection efforts that took place regarding my case.