Microsoft account Hacked.

I cannot log in to my Microsoft account using my email because it says that my account does not exist. I am still signed into the same account on my computer but in windows it says that my name is Jenny Henkes, which is not my name. I have also been signed out of my connected Minecraft account, and cannot sign back in. Edit: I realised that my account has definitely been hacked and the hacker has changed the email and password. Is there a way to recover my account or even just delete the account to revoke the hacker's access. I can see the new email address if that is helpful.