Locked out of personal account after it was hacked into

I have been locked out of my personal email account and one drive account since end of August when someone hacked into my account. I have tried to regain access to my account but am unble to access help without logging in with personal account. I have been looping around the same issue for weeks now. I desperately need access to my email and onedrive accounts. What is the best way to resolve this/move forward/contact microsoft and get somewhere without going around and around a loop?