I really don't think someone with a small handful of jobs in the teens could possibly be suspected of botting. You can reach that in a matter of hours. The OP possibly got the account locked out by logging in at a remote location. This happens if you take your laptop to a new wi-fi or log in at a friends hours ect.

I dont think GM's are out and about sending tells to folks to see if they are botting. Even if they did, I don't see anywhere in the ToS that says you owe anyone a response if they send you a tell. And I certainly haven't heard any "Official" statements from the DEV's warning people they need to respond to GM's. Honestly I think they have more important things to do than bot check. Its probably something innocent and routine. Id contact customer service.