Cancellation of Product

I cancelled my Discovery Health Product a month ago. In the beginning of the year they reversed 2 accounts not paid. I sent it back in for payment a month ago after I received phone calls from the doctors admin office that the account is still outstanding. Discovery placed my account on conservation after I cancelled it while it was suppose to still be active till 31 Oct 2015. the account was sent back in and for 2 weeks they done nothing with this account after the doctors office sent it back in. Today i received a call stating the medical aid did not cover the account and i am now fully responsible for the account. Which is the second one this year. Truly the worst service ever received from a medical aid!!! You pay so much for a service that is not benefiting anyone.