What should I do if I can't get the required bank letter for my Non-O visa application in Thailand?

TransferWise issue: So I opened account at Bank of Ayudhya/Krungsri Sukhumvit 31 in Bangkok. I transferred twice around $14,900 USD by ACS transfer. (Maximum $15,000 USD for ACS. My US bank, Capitalone360, does not do wire transfers to non-US banks. I went to Krungsri, asked for letter for retirement visa, stating balance over ฿800,000 THB, transferred from outside Thailand. The bank manager refused. I had a Thai person interpret. TransferWise bounced the money through several banks, the last being Bangkok Bank. They said get Bangkok Bank to write the letter. I’m waiting for BB to open at Central World but I’m not optimistic. My ideas are 1. Go to head Krungsri office see if they can call BB and write the letter. 2. Engage a Thai lawyer. 3. Arrange to transfer more Money from USA by direct wire transfer, perhaps open BB account. I do have embassy latter as to address (one year condo contract), landlord’s thai ID copy, showing monthly income >฿65,000 THB–but it’s by transfer from my own funds, not pension. I’m applying to change tourist visa from USA to non-O 90 day by reason of retirement at Chaengwattana.