I rented a apartment from XXXX XXXX XXXX XXXX in XXXX in XX/XX/XXXX. After a few months of residing there, I have to move back to XXXX in XX/XX/XXXX. So I terminate the lease and pay the penalty which is {$5800.00} the remainder of the balance owed. Then in XX/XX/XXXX I got a call from XXXX XXXX saying that I owed them utility bill of a hundred and fifty something dollars. I call the utility company XXXX and ask about the charges and was told my account is paid in full and has been closed. Then I call XXXX XXXX and told them about my account standing with the utility company but they insist I owed them monies. so I ask for proof of bill but nothing came. After a while I start getting calls from the collection agency " XXXX Pro-Collect ''. I explained to them what happen but was told to sent in proof. I did by regular mail but still got calls from them on my cell phone. Then I spoke to a XXXX XXXX from the agency and she told me they did n't receive any mail from me. I proceed to sent them a registered mail this time but calls continue coming in. I call the agency and ask why are they still calling me and was told they are waiting for reply from their client but at the meantime they will keep calling. Then the last thing I know my credit report has a negative collection report.