Sorry to say but your account is done man
I had the same issue. On Monday I payed someone 50g that had mats to do the warlock epic summon in Dire Maul. I paid 10g to anyone who would stay and help finish. We did finish and I got my mount and I logged off. Server went down and come Thursday I was banned when I had time to log on again. I appealed and the only answer I got tonight was my behavior exhibited gold trafficking... No further inquiries to appeal will be made... No other reason than that... Good luck man.
If this is such a strong issue they should ban currency trading between players all together...
I just hope the players that I thankfully gave a reward for helping aren't banned either.
Time to go back to Everquest Phinigel server where they allow vanilla progression.