Pretty weird, do they check messages of 2017? I received the ban after sent those private messages to different devs. I´m pretty sure that was the reason, but I would like to receive an answer from them at least. 1 month and no reply.
What difference does it make? Copypasta is a far more serious offense than PMs (unless you were sending malware).
If the reason was those 2 messages, then they should explain me that and answer my messages, like the rest of the people that deserves a reply, and give us a chance to appeal.
I didn't know what your ban was for, but as above it's probably for copy and pasting and you likely won't be unbanned for it unless the policy changes.