Involvement on a bounty campaign and doing some signatures are not liable for a ban but if you really did a serious offense let's say a criminal activity as @MoxnatyShmel just said and did not abide within the rules that for sure is liable for a ban. Please explain what happened not just hurrying to tell everybody over something that we are not aware of we can't understand it and besides your posts are in German and Russian language we can't comprehend it even if we did a review over your account if what really happened.

Is this a local issue? Maybe your local mod will help you with this or you may follow the steps here to recover your account again Recovering hacked/lost accounts.