Can I modify my method of payment? BESTSELLER SERVICE 13 July 2019 22:37 Updated Follow Unfortunately, once the your order is placed, you cannot modify your method of payment. Related articles When will I be charged for my order? What methods of payment can I use? Why is BESTSELLER showing on my credit card? Can I pay with a gift card online? Can I add/remove items from my existing order? Comments 0 comments Please sign in to leave a comment.