Discovery's abhorrent service

If I could give a minus rating I would. On the 6th January 2024 I sent them an email regarding my oncology registration/cover (confirmed via a letter in March 2022) as it would seem, according to my online discovery profile, I am no longer covered under this benefit. Up to and including today I have not received a reply even though I have been issued not 1 but 2 reference numbers. The email I copied in was to the Head of Health Services was returned with the message that I do not have permission to send to the email address ???? Surely as Head of Health Services they should be kept informed. Once again Discovery is playing God with peoples lives