Hello MichalPL . Ofc it is possible to solve this issue
You haven`t done anything wrong and it`s your right to play here. Unfortunately , I checked the ip that you gave me and your IP is affected by an old error that we have in the banning system. (Old ip ranges keep appearing) . Unfortunately we`re still working to fix those errors so it`s most likely that your ban will re-appear at some time. The most simple solution is to enter on the IRC channel and tell us. You`re not the only player affected by this bug in the banning system. Basically , my advice to you is : Everytime u want to play but your range is banned, enter the IRC and ask that we unban that range. Any admin can do that. (This message is only for MichalPL , in case other players are reading this, first they have to contact an admin in order to check if they were banned or not)
We are sorry for the situation. I have unbanned your range now. Hope it stays this way . Good Luck !