Did you managed to find a solution?

I am having the EXACT same problem also. Currently payment option is PayPal, but today receive email saying payment processing error. When I try to change payment option, SE store don't accept VISA card or credit card.

Previously I encountered problem with "Debit Now", my order got cancelled multiple times when I tried using that option. Don't know what to do now.... worried cannot play when EW release 🥲