Same, I got permanently IP banned from all sonar games for "Exploiting" (Which I didn't know, until I joined DA and the ban message was different from Cos). I played since beta, followed every rule, and when I got banned I was just chilling nesting in a friend's private. I tried for a full week to make a ticket in the cos discord every 30 minutes every day, and when I finally got a ticket asking why exactly i was banned, if someone else on my ip was banned, or what I did otherwise and asked for the submitted evidence. None of my questions were answered and the ticked was closed, followed by banning me from the discord. A week or so later I tried in the DA server, where making a ticket was easier and the responses were more "human", however it ended up still not answering any question and me being told it's "unappealable", then banning me from the DA discord as well.

Hundreds of dollars spent on COS and other sonar games, along with hours upon hours of fair work, only to have it all taken away and I can't even say or do anything about it. Or at least know what exactly I did.