Its It’s a shame as i am due to fly to chiang mai tomorrow.. ah well will see what happens. Ironically the stamp is oct 25 which is a sunday Sunday - so obviously not open on that day .
I was at immigration yesterday to switch stamps from old passport to new.. and got stamped but was there with a bunch of people who wanted to do extension s with letters and all of them were sent away. They wouldnt even look at the paperwork... so none of them have stamps and all were told to come back after sept 17