Deductions from my account after contract cancelled

In June 2016 I took up an offer from a call center agent for a data package. I stated my minimum requirements of 5 Gig per month needed for my business and the agent confirmed that the deal was 5 Gig per month. I discovered, after taking delivery of the router and SIM card (via courier) that I was sold a 500MB deal as my data ran out after a few days. I called to report this and it was agreed that my contract would be cancelled. Arrangements were made for the courier to collect the router and SIM cards. This was done on 14 July 2016 and I have the waybill to prove it. The problem is Telkom continued to debit my account each month from July till Dec with a total of R1700 even though the contract was cancelled. I reported this to Nabeelah Slamdien at Telkom Cavendish in September 2016 and even completed another cancellation form. Yet the deductions continued. On 8 November 2016 I received an email from Nabeelah saying the SIM cards were still active but the contract was cancelled! She asked me to contact the billing department because they couldn’t do anything further at the store. After numerous calls to the billing department (Divan Snyder, Sibusiso Dladla, Khule Madanyane) the deductions continued and eventually stopped at the end of December 2016 for this particular contract. I have tried over the last two years to get Telkom to reimburse me for these deductions from my account. Telkom, deducting funds from my account for something I did not use is **********!!! Stephen Schwartz at Blue Route Mall is the only person who offered some relief by contacting the relevant parties involved in this saga and advising me that I need to do an affidavit confirming the above details and that he had logged a call for some to call me. To date, I haven’t heard from anyone. Once again , this is ********** business practice! Telkom needs to reimburse me.