eFootball Coins Purchase Failed With Error Code 0-0-26-3

I have been facing a persistent problem when trying to purchase coins in eFootball through Google Play for about a month. Every time I attempt to buy coins from inside the game, the purchase fails and an error message appears saying that the purchase could not be completed with error code 0-0-26-3 (purchase failed / an unexpected error occurred). Because of this error I am completely unable to buy coins and therefore cannot purchase special players or benefit from in‑game offers, even though I am willing to pay and have no issue with my Google Play account outside the game. I kindly request that this technical error be resolved so that I can successfully buy eFootball coins again through Google Play and use them to purchase special players and other in‑game content without any further problems.