In Bangkok, 90 day reporting can be done in person, by mail or internet, I assume in person is available but are either of the other 2 option available.
Also for 90 day and yearly exemption renewal the is an online appointment booking system usually available, again are either of these services offered?
, 90 reporting, for Bangkok, is at Muang Thong, not CW. My 90 day online efforts also failed recently, although usually ok, and I had to go to Muang Thong. You can book an appointment to do it which avoids a queue, if there is one.