, sounds like you used a site impersonating TH immigration, there are lots of them for every country in the world. You think you have gone to the government site but a small change to the URL takes you to their "pay' site. Happened to me many years ago when applying for an online visa for Australia. They wanted £50 for something that was free!
With respect to financials, the BOI needs to see a yearly income if at least $80,000 I was able to do this by investing in a special retirement annuity that paid out immediately and provided a certificate which BOI accepted.
As a word of caution, it took 8 months to obtain our LTR’s as the BOI kept requiring additional information including attested proof that my wife and I were still married (I chose the sponsorship route to minimise the income requirement)
, spot on! I am 80 and mist insurers not interested. I got good cover exceeding LTR requirements at a reasonable cost, all on-line and with direct conversations with an actuary to discuss medical results which I volunteered in the spirit of transparency.
, both options exist. Download the Line phone App then once you have the App running search for “Smart Visa Thailand” All information is there but it takes some digging!
Same here in Chiang Mai but at Central Festival Immigration. My wife got her Non O retirement and last entry stamp only plus a new multiple re-entry stamp.