What should I do if my Thai eVisa payment keeps failing despite using a valid international debit card?

I finally submitted my application now that I landed in Vietnam but it keeps saying payment failed or canceled. I only have one international debit card with Charles Schwab that I’ve taken and used in over 12 different countries with no issue. I have a travel notice set for both Vietnam and Thailand and I am currently using it for other purchases.

I’ve tried safari, chrome, DuckDuckGo, laptop and mobile and keep getting failed payment. I’m so stressed out does anyone have a solution please? I’m on hold with my bank but their headquarters are in Texas and no one has answered yet. I want to give up.

EDIT: the Thai eVisa payment processing center is a Thai bank however its address is located in HONG KONG. I called my bank and they approved the charge and added Hong Kong to my travel alerts in addition to Vietnam and Thailand.

According to the Schwab representative I called, the eVisa website also used the current address zip code for the billing address - which is so nonsensical bc if I have to be in the country of the embassy I’m applying to why would they use the current address zip code for the billing zip code? Why not ask for that when taking down payment information?

Anyway, hope this helps any future applicants