What is your nationality, after submitting your application did they request any further documentation, or how soon did you get rejected from the date of submission?
so how come he says 7 days, thst is just not enough time, even 10 working days might be tight. Allow 2 weeks, enjoy HCMC everything is incredibly cheap there!
Seriously who’s ever been stopped to produce a uk driving licence, they will rarely stop you unless your tax is out of date or your vehicle is a jalopy on its last legs. I have never bothered to get a Thai licence🤷🏾♀️