Product: Debt collection

I move into XXXX XXXX in XX/XX/XXXX. I was pregnant and separating from my husband. My son came a month early and I was told I wasnt going to get paid maternity leave after I was told I would. I went to the office on XX/XX/XXXX and told XXXX that I would be breaking my lease due to not being able to pay the rent. I also provided them with a letter. She stated that there will be a two month termination fee as stated in the leasing agreement. I looked over that leasing agreement from front to back and there was nothing there stating a fee. She couldnt tell me where it was located either. I signed a document stating I was breaking my lease. I move out XX/XX/XXXX and received my final bill on the XXXX which states an amount of {$520.00}. A month later I received an email stating I owed {$1900.00} which I didnt know at the time. On XX/XX/XXXX, I received a text from my brother letting me know someone by the name of XXXX XXXX from Hunter Warfield was looking for me. I reach out to see who he was and what it was about. He stated that he was collecting a debt on behave of XXXX so I was ready to pay the {$520.00}. He then proceeds to tell me that I owe {$1900.00}. I stated to him that my final bill stated {$520.00}. He then stated that I didnt give them notice and that was what I owed. I asked him to send me the documentation where it shows that amount. He sent my leasing agreement and that was all. The front page had the amount that I owed only it wasnt {$1900.00} anymore. It was {$3400.00}. I reached out to XXXX and ask why my balance increased. The manager stated it was a mistake on the old property managers end and that multiple accounts were that way and she no longer works there. I asked why wasnt I notified about this and he couldnt answer me. He only stated there was nothing he could do and that he would go over my account and reach back out to me. He never did. I reach backed out a couple days later and he stated he couldnt find my letter giving them a months notice or the paperwork I signed after. I didnt have the copy so I couldnt show any evidence. Until I received a refund from XXXX XXXX. I called them asking why I was receiving it they stated it was because someone from the community called and put the account back in the communitys name. I called the property manager again and he stated he doesnt know why that happened. I also tried reaching out to XXXX to find out where in the lease it was located. She stated that my leasing agreement is different from what they have now. The property manager stated I should try resolving it with Hunter Warfield and so I called and let XXXX know that the amount is wrong and that I am willing to pay the amount I owe of {$520.00}. He stated that wasnt going to work and I let him know that I wasnt going to pay that total amount and stated the next time I called he was going to be more and hung up. So it ended up showing up on my credit and hurting my score so I called Hunter Warfield again and tried to do a settlement. I paid {$660.00} on the account and never made another payment because it was too expensive and I didnt owe that much. I tried disputing it and nothing worked. So now Im filling a complaint because this is unacceptable.