So what do you is going on here? Working illegally? Dive instructor?
Phuket has diving. Phi Phi has faranfs working in dive shops.
Thats my reading between the lines.
Not for a 4 week stay. 45 days is visa exempt. They kicked her out 3 years ago. Her story doesnt sound 100% to me but if minor, 3 years ago is forgotten.
4 weeks you dont need a visa. I wouldnt worry about 3 years ago. Why would they ban you for 5 years? Dress well, dont start an argument. Smile sawadee kha, khorp khun kha. You are in.
How hard is it?
Phuket and Chiang Mai was easy. I cant see how BKK is better, more strict I would expect.
Maybe try a male. Guys dont care as much. We just think about 2 things.