Ace Cash Express

I have tried three times today to get a copy of the checks that I have cashed with ace cash Express and was told by staff at store and costumer services that I can not get a copy of the file they have for what checks that I have cashed with them I have cashed checks at other places and am able to get a copy of my history from them but not ace cash Express i have told them that I need them for legal reason but they still will not let me get a copy of the information I need to prove that I was not wrote checks that someone says they wrote me but ace cash Express will not give me a copy of the cashed checks from there facilities to prove that I never received checks that I am being accused of cashing