Unban Request

Greetings,

I have played SPARTA servers a long time ago and left. Now when i came back, every time i try to join it says that i got kicked out.
I suppose i have been banned but i dont know since when, for how long and why. I may have been banned because of high ping/lag or toxic chat.
May i please be unbanned?
At the time of my ban, my nickname was sTipi