Telkom agent fed customer misleading info

I have a router and it gave me difficulty.i then got a call from a Telkom agent about 2 months ago asking if I am experiencing connection issues as there were multiple customers with the same prob.i then said yes and was offered another deal which I took but as I never look at my account billing as I know it gets debited I was shocked to see my invoice and that the 5 gig on the go subscription was never cancelled and I’m billed for it.i would like that recorded call to be traced and dealt with ASAP as I cannot be paying two subscriptions and I was misled by that Telkom agent