Hello, any advice please on how I get a medical visa. I am inside Thailand (phucket/phang nga) and having major treatment until at least September. Then need follow ups the rest of the year .

I have been treated in Thailand since May already, have a lot of paperwork. I am in hospital 6 days a month.

What official paperwork do it need, and where do I go with it?

My non b has expired so think this is my only option.