Billed for services cancelled

I sent numerous emails in November 2016 to cancel my telkom DSL and landline service and no response. Eventually I went into a store in Kennilworth Centre where I was assisted and I was assured that all my services with telkom were cancelled. I checked my line and both landline and DSL were switched off. For some reason I started receiving bills for soft cap 20gig services recently in November and see I am being billed R99 for services I cancelled in December last year? I phoned the telkom call centre and was assisted and told to email my complaint to an address which I did and told that it would escalate to a manager. I have received no feedback for over a week and wonder why I am being billed again all of a sudden when I cancelled the services a year ago and am not using Telkom?????