I never had this problem with the previous payment provider (issue only occurred once and it was on my bank's side so it was easily cleared up).
Now I have to place a ticket every single time I want to purchase gems in-game (no gem card provider in my country, and the official sites won't sell me a digital version because "regions" and mine apparently isn't important enough to sell to 😡). As soon as their contract with this payment provider is up they should drop them like a hot brick.