Banned a few years ago, reputable Gp seller did nothing wrong

Hi this is Skordallos, my ban was a few years ago I'm not sure if its possible to dispute but I figure I'll give it ago. Basically I traded almost a thousand dollars worth in a short span without any problems or complaints and one day I was completely banned and never told why. I'm not sure if someone just didn't like me or what but I never did anything wrong as far as I was concerned. Let me know if anything can be done as I would like to become a member of this community again! Thanks

Link to my gp shop/account:
http://gnu.sythe.org/showthread.php?p=1828794

 

Refer to rule #2: http://sythe.org/showthread.php?t=742038