Product: Debt collection

I had communicated with the Staff of XXXX XXXX manages by XXXX XXXX XXXX XXXX XXXX XXXX in XXXX TX regarding moving out, terminating lease. We moved out and then we receive collections notice and calls from NCC trying to collect on their behalf. I explained to NCC that it was incorrect figures because I had advised the staff of the issues. I called the staff and the lady I had spoken to was no longer there. I emailed another staff member and let her know of the situation and she said there was nothing that could be done since it had been turned over to collections. We asked about returned remotes and keys and she said they were no use to them because everything had been changed and re-keyed. That was a lie, we passed by and the remotes and keys worked, even the linear system. I contacted someone higher and explained the situation again, and that this was a ridiculous collections charge that has been affecting us tremendously all because someone didn't communicate and she said " im sorry but I can not speak on behalf of someone who is no longer employed ''. I explained that her employee lied about the remotes and keys not working and that I had photos proving and date stamped and she told me those charges would be removed and invoice revised. I also asked her about the accelerated & reletting fees, she said that was the time it took to find a tenant. They charged me in full, i told her I called in inquiring about a 3 bed 2 bath apartment and was told 7 people were on a waiting list, I also told her that I called in to investigate that if that unit had been rented and i called in stating that I had a delivery for flowers for unit XXXX she called the new tenant on the other phone and was told to hold onto flowers. Once I told her about that too, that invoice was revised again, but she failed to remove charges as they still appear. I questioned her regarding the carpet shampoo, as per the Texas apartment associations lease, only fees are to be charged for cleaning when carpets that are soiled beyond wear and tear. Which in this case they were not, we kept them neat and clean, and also they had a faulty washer that overflowed and their onsite maintenance shampooed the carpet because of their faulty washer overflowing. So they revised the invoice 3 times after telling me they couldn't because it was now with NCC. There was so many problems, that I had to be calling the police for situations ( call logs and PD logs attached ) it said gated community and the gates we're always open to the point of someone trying to break  into our vehicle and other 2 times it was vandalized. that was reported and nothing ever done. anyone had access. I didn't receive response for that. These absurd charges ruined my credit as well as my husbands! High interest in vehicle note and declined for other lines of credit because they kept trying to collect over 6000.00 in  false fees, and the worst part is that credit agencies show that my highest balance was XXXX some and have a balance of XXXX some. The incorrect balances keep appearing and is giving me a negative factors. I was declined to buy a house, I was eyeballed when my new employer checked my credit. My credit shows that I've made payments towards that collection and still have a balance, that is incorrect.