I purchased an item from Best Buy using my Best Buy credit card. I paid the amount due in full on XXXX/XXXX/2015. The payment of {$100.00} was issued through my online services at XXXX. 
The account number for my Best Buy account had not been updated on my online services account with XXXX, so the payment went to Best Buy but to my prior account number. Best Buy now claims that I have not paid and my account is now in arrears {$240.00} because of accruing late fees. I have contacted Best Buy and they will not speak with you regarding this issue and refer me to their bank which is now Citibank. I contacted Citibank and submitted my proof of payment to their Payment Research Department. I continue to get statements saying the account is not paid. I spoke to " XXXX '' in " Escalations '' on XXXX XXXX and still the matter is not resolved. I have no way of resolving this because clearly the issue is inter-bank. I made a payment to Best Buy which was sent to my old account number XXXX and should be posted to my current account number XXXX, It is egregious that Best Buy offers no consumer protection to their credit card users as clearly they are the entity that could easily resolve this by having the payment credited to the correct account number. The continued billing and late fee surcharges have escalated to the point of harassment. I paid this account in full before its due date and yet I continue to be harassed because no one seems to want to do the work on their end to get this matter resolved. 
