Credit card or prepaid card — CITIBANK, N.A. (WA)

Problem during payment process. Bestbuy routinely locks me out of the payment portal, ran by " Citibank '' now. I have to contact tech support at least every other month in order pay or log in to check on autopay amounts. Its suspicious. Now, I receive XXXX phone calls EVERY day regarding a single late thirty dollar payment. I have attempted to block the number and still receive the harassive calls.