I used TMT travel and visa in Chalong. For few baht they set me up w Bangkok bank. Bank agent met me at visa agent w my passbook and card. In and out 7 minutes. Tourist visa ( 90 day) and TM30 from local hotel. Did this last week. No issues at all.
I just dealt with this two weeks ago for same visa.
It’s the Thai site, not your country. Had nightmare w that system. If you’re photos don’t meet requirements, it still lets you “ apply” but you can’t pay.
The Thai embassy in Oslo has a really good guide in English. It helped a lot. Plus I also put all other data and photos in as PDF.
Worked out fine. Sadly there is no “ help” with the online application.