I got an SMS telling me of appointment at the University in Udon city at 6am on the 25th - the appointment for 2:30p. I got there early and was re-directed 3 times to find out that I wasn't in the system. I showed the SMS I had received and went to 3 more people, one of which added me to the system. After that, things went smoothly and I got my 1st jab of Pfizer. 2nd jab scheduled for the 15th. Don't know how I got deleted but thankful to finally come across a gov worker with a brain (to add me back in) instead of "cannot". Apparently others with the same problem - I suspect somebody clever playi.ng with the system. Pretty sure this came from expatvac because I didn't register anywhere else.