National Credit systems contacted me for a debt in XXXX. I disputed the amount and what it was for and was provided little information or how the charges were brought about or were they actually done. I did research and questioned the validity of the debt and the collector which has been pretty shady. I paid them in XXXX of XXXX so i could continue to rent apartments which I have done so for three years. They closed the account on my account in XXXX XXXX, just to reopen it in XXXX to say that I owe it. They refuse to provide the paid letter and any information on the debt, so I can take it the legal route. I lost the paper they originally sent to my apartment in XXXX I do have my bank statements showing that I paid them in XXXX XXXX and I will gladly show them but they refuse to accept them.