I've been here 10 years now, 5 years on married visas and 5 years on an elite visa. Planning to switch to retirement.
Past 3 years transfering my monthly pension payments into my Thai account, same day every month. So I have 3 years bank statements and pension statements, but the local immigration insist on a Proof of income certificate from the British Embassy...
Since the British Embassy don't provide it, I'm forced to use an agent... Very frustrating. My Swedish, German and Irish friends, just pop to their embassies and get a certificate, easy peasy.
If you are going to an embassy to get a tourist visa, why not get a non-o single entry retirement visa instead? Then you just need to do an extension here.
When you say Kbank, do you mean Kasikorn or Krungthai?
Reason I ask is because I have this with Krungthai. Their facial recognition in their app doesn't work for western faces, so they bypass it to get the app to work, which limits to 50k per transfer... They insist thai banking regulations forbid foreigners transfering more than 50k per transfer (not true)
They won't accept thai bank statements, for proof of income, without an unobtainable embassy certificate... Which is acceptable in other provinces.
You can try asking an agent, but probably looking at getting a non-o from somewhere they accept an equivalent amount, in you home account. Maybe Malaysia or Cambodia