I had an expired non-b visa last May 11, 2020, and currently not working, and my employer already canceled my WP.
I went today at MTT to apply for an extension, but after the IO checked my passport and the last visa stamp, she told me to go to counter N at Chaeng Wattana.
I'm here now at CW as per the IO told and waiting for my number to be called.
TLDR : Answer Summary
The user is facing an issue with an expired NON-B visa and a canceled work permit. After attempting to apply for an extension at MTT, they were redirected to Chaeng Wattana Immigration for further assistance.