Medihelp quick to take premiums without paying

i have sent accounts to medihelp for the past month which everytime comes back rejected with a different excuse and gets resubmitted. On friday i requested my premiums be refunded and ill move to another company and pay all the accounts myself. Every single time we phone it takes over 20 min to get through and when i ask to be put through to the manager they are always in a meeting. Friday morning i was told to send an email to [Email Removed] to resolve my issue. Guess what till now no reply. HOW CAN WE PUT OUR LIVES IN THE HANDS OF MEDIHELP!!!