Banned for ban evading? :'(

hello sythe i am banned for ban evading but i didnt do it i just bought one pin got a vouch for the pin buying from pie4muh and i got vouch from wise brute he was a real life friend but can someone explain ban evading to me? or maybe unban me i didnt do anything wrong u can check my inbox and sent items and my msn and wathever u want to check plz help me i want to get my sythe back :'(