Don't really know if this is a solved issue (if that is the case, please send me the link), but i bought the game minutes ago, GOG gave me the serial key, the game did accept it but everytime i want to get into a server, i get kick out, or says to me that i'm already banned. In the best case scenario i get to play for couple of minutes and then get kick out again. I'd really appreciate any help.

same here

You may want to contact GOG support about your problem as the staff may not notice the forum post.

I don't own Warband (guess that is the one you are talking about), so can't help you there.