Recently got hacked


New Email
After getting hacked, I realised the hacker could still get into my e-mail account because the recovery e-mail address is not owned by me and I can't get rid of it. I've tried deleting it, but to do so I need to log into the account that isn't owned by me to confirm it. Even trying to add a different e-mail address to link to my account leads to me needing to send an e-mail to the one not owned by me to confirm. Any help would be greatly appreciated