No, you don't have a ban, I suspect you're talking about a vac error:
https://gtm.steamproxy.vip/discussions/forum/9/2828702372991195767/

Originally posted by k4izen:

Hello Steam Support,
I recently received a ban in Counter-Strike 2, but I am not sure why. I have never used cheats, exploits, or shared my account with anyone. I only played fairly, and I also did not

no steam support here. This is a community only forum. Instead of making threads, actually read what the message says, as it will also give you a link to the necessary info. So either you got a "disconnected by vac" or "global cooldown" message, neither is permanent