Just to follow up, I used Thai Visa Centre and I would recommend them. It was 7k for a 60-day Covid extension, and I asked for express service which was 1k. They are extremely organized and professional every step of the way. Their courier picked up my passport and brought it back when it was done, in exactly 48 hours. It was worth every penny for this service and I'd do it again :-) Thanks to everyone who gave their advice!
Thanks, Vicky, I appreciate it. I'm a total Thai immigration rookie, and was hoping to get my Vietnam approvals done before my visa expired. But, looks like I'll have to deal with this now ๐
Oh sorry, I know you mentioned it already! ๐What should I ask for when I go to immigration, just say I can't travel? Do you remember the form for that?