I'm posting it and closing comments. This isn't a discussion based group, and I think the link is clear. I'll delete any pending posts about test-n-go. Thank you.
I'm glad it worked out for you Robbie, and I'm glad you got the extension of stay. I can not see any reason to leave commenting open, so I'm closing comments.
The extension of stay based on medical purposes is sold up to 90 day increments. Just because an immigration officer isn't happy issuing it doesn't mean anything. You're out of nothing applying again.
What immigration office is this, if you don't mind me asking?
Important reminder: different immigration offices have different policies. This post is about Bangkok Immigration. Information about Kanchanaburi (for example) isnât helpful.
The only way to stay longer is with an Extension of Stay based on Unable to Travel due to COVID-19. This is an optional extension of stay, and the immigration office does not need to grant it.