Product: Debt collection

On XX/XX/XXXX I terminated my lease with XXXX XXXX XXXX XXXX because I purchased a home. I gave XXXX XXXX  a 60 day written notice. On that day, in person, I was told by her that since my lease did n't expire until XX/XX/XXXX I would have to pay a 2 month penalty for terminating my lease early. She informed me that penalty would be 2 months rent. My rent was {$730.00} per month. So I assumed that I would have to pay {$1400.00} to get out of my lease. I moved out onXX/XX/XXXX and met with XXXX to return my keys and to pay my 2 month penalty. At that time she told me I owed them {$1800.00} instead of the {$1400.00}. I disputed this but go nowhere with her so I just wrote her a check for that amount and returned my door keys and mail box key.
I week later I received a bill from XXXX XXXX XXXX XXXX. that was signed by XXXX XXXX stating that I owed them ad additional {$890.00} for a Lease Termination fee of {$390.00} plus a {$500.00} EP deposit. I called her and disputed this since my lease does n't have any such fees on it. In Section 23 of my lease it states that I must pay a " lease abandonment fee equal to 2 months rent '' and that I am " obligated to provide no less than 60 days written notice of intention to vacate the premises. '' I faxed her a copy of my lease to prove that I overpaid them and owed them no additional fees. She therefore sent me to collections.
On XX/XX/XXXX NCC Business Service , Inc. sent me a debt collection notice for {$890.00} on behalf of XXXX XXXX XXXX / XXXX XXXX XXXX . I called them and disputed this bill. I sent them a copy of my lease, a copy of my bank statement showing that check I wrote for {$1800.00} was cashed by XXXX XXXX XXXX XXXX. onXX/XX/XXXX. I also sent them a copy of my lease termination request letter.
I am writing you for help because every time I call they say that their client XXXX XXXX has come up with a different story as to how she came up with this debt of {$890.00}. At first I was told it was a {$500.00} eDeposit fee plus miscellaneous charges that I owed. I sent them a copy of Section 29 of my lease that proved that the eDeposit was a {$100.00} fee that I paid at time that I entered my lease in XX/XX/XXXX. After that they refused to work with me so I called again and was told that XXXX XXXX 's new claim was that the {$890.00} was owed because my {$1800.00} that I wrote on XX/XX/XXXXbounced. To prove that claim false I sent them over a copy of my XXXX XXXX  stating showing that the {$1800.00} check was cashed and deducted from my account on XX/XX/XXXX. After that claim was proved false I called my a month later and was now told that the {$890.00} a penalty for failing to give a 60 day written notice. I told them to get the notice from their client XXXX XXXX but they claim she had no such written notice. So I faxed them a copy of the written notice that I gave XXXX on XX/XX/XXXX After that I was told that this was still be reported as a uncollected debt on my credit report. I do n't know what else I need to do to prove that this property manager is lying and that I paid all the fees required by my lease agreement to get out of this apartment. I have not heard anything else or receive any other bill or notice from NCC Business Services since I last spoke to them in XX/XX/XXXX.
I need this resolved and cleared so that do n't ruin my credit with false charges.