Hard to believe you are 100% innocent.
Why?
If MA is taking so much time to unlock your account, you were probably reported by several players, and sorry to say, we know all of it. (but we could be wrong).
I am going to tell you a small example of what happen to two friends of mine (in real life) that got their accounts locked at the same time.
You see, their are father and son. Occasionally they play next to each other using the same IP.
Also they share a similar avatar name with numbers, one might even think, just by the numbers and names in the avatars, one is a second account.
But it is not, it is father and son and I know both of them very well, the son, I saw him growing up since he was born and today he is a young men ready to enter university.
They were doing the sand king wave, at the end, someone complained about the loot and mentioned something like "double avatars".
Next day they both got their accounts locked.
Each one of them, sent a support case, with ID's and after 2 days the problem was solved and their accounts unlocked.
I never saw MA locking accounts accidentally for so long.
Some BS is going on.
Whatever you or anyone else think or though to "play the system" we all already know about it, so is MA.
All it takes is several people to report someone with reason, with screenshots, with details and trust me, your account is locked.
Maybe you are innocent maybe your are not, I do not know, I just find it odd, that you are still locked.
Small edit:
Due to this thread started last year and you are still locked, (just noticed the dates more precisely) I doubt they will unlock your account.
Not going to say you are guilty or not, that is for lawyers and judges, and the money you have in both accounts.
So maybe there is more them you are telling.