I entered Thailand in April with a 60 day T/R visa and got 2 extensions at the immigration office without leaving Thailand but then took a flight to Vietnam for a week and returned via Suvarnabhumi and almost got refused entry
It was only when a Supervisor got involved he authorised my 30 day exempt visa 🤔
As a post already stated they are getting tougher and I have 1st hand experience
I guess you prefer to pay a corrupt agent in Pattaya only to find when the Immigration Police come knocking on your door (and they will) you will get deported and spend the next 5 years in your crappy home country