You will see the the procedure you need as a Best Buy Credit Card Person to access their account through internet, in which they can make online payments, reach customer services number for further assistance. The Best Buy credit card are issued by Citibank, and Citi provides all above services on behalf of Best Buy.
Method of Access Account Online
Helpline Number-Make Payment by Phone
• The Best Buy credit card customer service phone number for payments and
other assistance: 1-888-574-1301.
Credit Card Physically Payment Address
My Best Buy Credit Card Payments
P.O. Box 9001007
Louisville, KY 40290-1007