Update: Contacted college for letter to end course. Letter was sent in a day. Went to the immigration office and cancelled ED.
Then took a trip out of the country. Stamped out with zero issues.
Also no fines when cancelling said visa.
TLDR : Answer Summary
The user successfully cancelled their Education visa (ED) by obtaining a letter from their college to end the course and visiting the immigration office, where they faced no issues and incurred no fines. After cancelling the visa, they left Thailand without any complications.