I think a lot of people don't understand the extent of the issue in this thread.
I made my account 10 years ago, living in a supported region.
I have since moved to a different country that uses a different supported currency within that same supported region.

I am unable to change my listed country of residence or the currency that I'm charged in. Customer support have told me it's not possible. Twice.

If I now touch my sub or would like to take a break, my bank card that is issued by the new country will be blocked as it doesn't match my listed residential country.

That is just a terrible system and terrible customer service. They obviously are aware of the SEA player base and want to include them as they've had official FF fan events in one of those countries. It's just nonsensical.