You need to hit their twitter & forums and get big support and somehow catch the eye of a senior who'll look into it personally - you will not get anywhere with just regular tickets. In fact, one of the GMs whom replied to you even used a standard reply for banned people - even if you aren't banned (he replied something along the lines with "we won't unban you" or something like that, it's ridiculous). That should show how much they care/know in the regular support staff.
Yup. Dont give up, but posting here wont help you.
Even if you are indeed innocent, the system can still have found suspicious games or logs and wrongfully banned you.
Keep all logs and screenshots, and make well formatted posts where it will get attention.
Its not about the titles, but the integrity of the game.
Do not blame the game masters or the support staff, and do not ask for proof.
They did confirm you were suspended for win-trading, so what you want is for them to manually review that internally.