I can't log onto my icloud account

Hey Everyone

Firstly, English isn't my mother tongue. So sorry.

I can't log onto my iCloud, because i can't remember my password (made the iCloud account a few years ago). I can't log onto my email, I used when I made the account, because I got hacked. Then I made a new email address, which I would prefer to use now. It keeps asking for the password to my old email address, which I finds very annoying, because i can't remember it. It doesn't stop. It just keeps "pupping up" on my screen. It says "Log onto your iCloud account). I can't log off, because of Find my iPhone.

Is there anything I can do to make this stop?

Kind regards, Morten