FB Hacked and Contact information Chaged

Dear Support Staff,

Facebook experienced suspicious activity at my account and blocked the access.

I precisely followed the recovery instruction, but no success.
I repeated it more times, but the accunt remained blocked.
I have not committed anything which could case this. I have uphold the rules.

I still receive message notification from the Messenger, but I cannot enter to read them anymore.

Do you have any idea, what can I do?

Please not that former links in this subject leads to different page I have already tried. I read all previous letters in this forum.

Thanks for your help in advance.