As long as the account and everything associated to it links back to your name and your phone number and your passport number I wouldn't do anything right now. hopefully your bank account wasn't opened up in Pattaya. I think the DTV reasoning is a bit of a red herring. What the bank really wants is to comply with KYC due diligence. Since it's only Bangkok Bank doing this it's an internal policy which sprouted up due to their lack of diligence. If you do happen to get called out, hopefully you can still show medical reasons.
wait in the 800 person queue at Chaeng Wattana to convert from visa exempt to Non O, then again 2 months later. Save 3 mature trees from becoming photocopy paper.
Convenient accessibility for this product was always an issue. I had forgotten or thought there were alternative ways to top up other than foreign currency notes directly.
So, I just reread through this voluminous product ad page to find 3 little words "exchange your money" buried in the very last paragraph, giving the tiniest clue as to how it actually practically gets funded/topped up.