I can say I have two Bangkok Bank accounts and several K bank accounts and more with the family. I have two businesses that support these accounts. I think I’m a serious customer and they did it to me. They just shotgunned me trying to get someone else.
Why not get a COE for Phuket, one week stay then fly to Bangkok. Get visa on arrival. Unless they change it to Bangkok sandbox and do the same in Bangkok. Take care of immigration a few weeks after arrival?