The old owner of my domain

Ok so, my new domain has a problem with the dns records, the old owner of my domain still has his dns records so I cant add my own dns records, I also cannot remove them, please try an eliminate these records so I can add my own records.

Cloudflare won’t tamper with your DNS records. You’ll have to make those changes yourself.

Do you have access to the domain registrar so you can change the authoritative name servers for your domain?