Unable to delete clouflare mx records in dns

Wenbsite: Thetoycentre.co.uk

Hi All - i’m using (trying to use…) an external email server. Their support has advised me to remove the 3 x Cloudflare mx records from my website dns.

When i try to edit/ delete the records - i just get a notice telling me that the entries were automatically added - and a link to disable mail routing. This i have done. The Cloudflare mx entries still remain in the DNS… How on earth do I remove these pesky blighters?

Do you not have the option to start disabling?