Failure to cancel DSL Faster service

I have been subscribed to the TELKOM 4G LTE (Broadband) service since November 2015. At that time I requested that my subscription to the DSL Faster option be cancelled. Despite numerous emails and submission of forms requested by TELKOM, as well as escalations to their escalation department (as advised by a call centre consultant),and also a visit to the Rosebank branch of the TELKOM shop (Reference No. ***1), TELKOM has still NOT cancelled the service as requested. They have been charging me R262.28 plus vat. for the past 5 months! Consequently they now owe me an amount of over R1000! This is disgraceful service and should be attended to immediately!