Send in a ticket saying this and I'm sure they'll unban it
Dear Blizzard Associate,
I am writing to you today for my dispute on the action i have wrongly been accused of on the account, PUT YOUR EMAIL HERE.
It seems you have permanently suspended me due to "Exploitative Behavior". I do not understand where this misinformation you have come across has effected you to deem my account "bannable"
I am distraught at that ban reason i have irrationally been accused of, I have never committed or took part in "Abuse of the economy".
I take this accusation very seriously and will never look to do it myself, I have never took part in any illegal activity in-game.
People know me, I am a legit player, I will never commit such a serious offense, I know the consequences hence I would never look to do it.
Please match my IP address to the time when it happened, as I believe I may of had a hacker penetrate my account and commit the offense to get me banned.
I cannot stress to you my legitimate gaming style, I will never abuse any rules or try and gain myself an advantage over different players.
Please, I implore you to investigate my account so you may see I am telling the truth hence I deserve to be unbanned. Any more information you need I will be more than willing to provide you with just let me know.
Sincerely,
PUT YOUR NAME HERE