Impossible to cancel with these guys

I filled in a cancellation request on the 22 May. I have followed up by phoning and going into the Telkom store about twice a month since then. Every single time I follow up, they have no record of the cancellation, or they say the number has been moved to prepaid - which is NOT what I wanted. And every time I follow up, the problem is \escalated". WHY oh WHY is this so difficult to do??? Money has now been taken off for a service I DO NOT WANT."""