Yeah sounds like they hired you to clean their license violation. So in court they could say "of course our code looks like theirs, they worked for us" Sorry to hear you got screwed over dude. And thanks for posting for awareness. Take it as an early life lesson and put your passion to work elsewhere.

Reposting here explicitly because Hacker News (aka Corporate Leeches) took it down and said "It should have been clear there would be a ton of overlap or a relicensing at this point" after Hackcyom violated AGPL

That's rough. I'd at least talk to a lawyer, but ofc securing housing and health comes first.