Damn, this is even worst than doing it yourself.
It is like hiring someone to plagiarize for you. Not checking his work is not an excuse since you shouldn't accept his offer un first place.
Anyway, it is your account and you can't blame anyone for what you post.

Since you got banned, you are not allowed to create a new account unless you think you don't deserve a ban and want to complain, which is not the case here.