@Tod ********
thank you very much for your reply! Do you mean what I have to do now is just simply file a TM30 at an immigration office nearby ?
Actually I tried to do it online many times on my second day but got fed up with the system ! I didn't know what I had been doing, let alone whether it was successful or not!
One more question , how can I gain a multiple ~reentry as I may wanna leave Thailand for a couple of days a few months later?
Thanks so much!🙏