Hey bud, looks like you've posted this in the wrong spot. To appeal for an unban you need to use this form posted by Wilco. It might also be an idea to read the rules so you can figure out which rules you broke and how you broke them.
In-game name: SGT Frisky Hen or Bee Cups
Your Steam ID (copy from your Arma 3 or steam profile): 76561198126696541
Date/Time of incident (ignore if linked to player report): 05/08/2015 @ 22.30 / 22.55
Which server: 1
What was lost: Two Vermins, a 4-five Pistol, random gear. (x2)
Value...
Who's going to talk me through which jet to buy next time :( You'll be sorely missed man (Especially you're constant stream of donations :p ) . Good luck in the future, hope to see you back soon!
Fill out an unban appeal here - http://www.altislife.co.uk/forms/5-unban-appeal/
Edit: Apologies sorry didn't read this too well. Might be worth filling it out and stating that you don't know who it was that banned you. They will probably be able to help you from there.
Sorry for sounding...