Citibank Debt Collection Complaint

Citibank Debt collection department,

Cont'd attempts collect debt not owed Debt is not mine California

I received a notice from - - - -. today, - - for the first time and the notice is dated - - offering me Tax Season Discount Opportunity to pay account balance of $8600.00. According to the notice, Citibank was the original creditor. I have lived at my current address since -/-/- and this is the first time I have been contacted about this debt. I also have a freeze on my credit since around -/-/- and I have no collection on my credit report. I do not owe any debt that I have not paid. This collection agency failed to first write attempting to collect a debt letter. This collection agency failed to grant this consumer the opportunity to dispute the debt. This collection agency demanded payment whether or not this consumer in fact did owe this debt. I dispute owing the debt in question. Thank you.