I bought some amazon coins last year and has been steadily using them.
But these few days, I tried to buy the latest card pack offer from Hearthstone and realised the system does not "auto direct" the hearthstone game to deduct from my amazon account (which I had a few thousand coins left)
Instead, it prompted me to make payment from my credit card.
Anyone knows what happened and how to make payment from my amazon account in future? (for this time, I have already paid from my credit card, so no choice but I really hoped this can be avoided in the future.
A step by step guide to how to effect payment from my amazon account in the future will be greatly appreciated. (I do not understand why the deduction is no longer linked to my Amazon account) I did not make any changes to my account as far as I remember. Thank you.