Why did I get ban for nothing?

I haven’t played war thunder for a while and seen an ad and wanted to get back again I’m a newbie but when I got back to it it told me that I got banned but I dont know why I havent played it for a long time I didn’t use any mod or someshit so I dunno why did I got banned and I dont know how to talk wit a GM so I am textin here thanks for any help