Bad customer Service

I joined the scheme last year October and my first time experience with the scheme it was a bad one,today I called the nurse helpline on ***and spoke to an agent by the name of Skhumbuzo while he told me to hold the phone hang up.I had already gave him my membership number and explained to him why am I calling.I called again asked to speak to him another agent answered and told me he was busy on a call,I then hung up and called again only to find Skhumbuzo who told me not to shout at him as if I was.the reason for my call was yo ask the turnaround time since he said he will call me back further more he didn't even know that I'm not covered for the GP.The call centre lines are bad you can't even hear them.my first experience has been so painful I don't want anything to do with medstart and I was considering an upgrade with them I don't think I will do that I just want to cancel the cover I have with them.Or is it I have the cheapest cover with them hence the treatment?