Capital One Debt Collection Complaint

Capital One Debt collection department,

Other (phone, health club, etc.) Cont'd attempts collect debt not owed Debt was paid Florida

I paid with a Check from - - - the amount of $300.00 to KOHLS, - -. They clear the check from my - - - Acct. After That KOLHS said they never cash the check because it was return. I went to - - - and the fax to KOLHS the the CHECK # -, cashed by them. After that they continue charging me the balance. I called again and ask what else I can do to prove the check was chased and never return to my acct. They request to me fax my last - Bank statements where it show -, - and -, I did fax to them. After that I still receiving letters from them collecting the -. Please help me to resolve these problem, I feel tire and frustrated, these is a violation of my consumer rights, and can damage my credit reputation. Thanks, - -