hi santiago! i had a similar experience, so just sharing in case it’s helpful.

the thai consulate in vietnam wouldn’t take my ed visa docs because i’m from “xinjiang” (an occupied area in china). i came back to thailand on a 60-day visa exemption, extended for 30 days, and my language school prepped documents for me to apply here.

the process took about 21 days. if your company can prep the docs in advance and you can get an appointment to switch visa types, it should be possible within the 14+30 days.

hope this helps!