Citibank Debt Collection Complaint

Citibank Debt collection department,

Credit card Cont'd attempts collect debt not owed Debt is not mine Hawaii

I received a call from - on Monday -/-/15 at -, it 's a recorded message telling you this is in regards to a sensitive matter, please press -. I pressed - and got someone on the phone when I advised them that I was pressing the number - he put me on hold and came back and advised they must have missed dialed and hung up. Then : I received a call from - - of - on Friday -/-/15 at -. He proceeded to tell me that he was representing his customer and that he has legal rights to advise me that I owe a debt to Sears for $850.00. He claims I opened this account in 2005. I did not open this account and told him so but he kept on talking, so I asked him to send me any documents via mail and he refused.