Computer Special Price not being honored by Telkom and still being billed - Order Number ***

I am totally at a loss! I am a widow and pensioner. I purchased a laptop at Nelspruit Telkom services on the 6th of October 2017 as detailed in the Telkom specials catalog of 20 September - 19 October 2017 (which I still have a copy in my possession). The special on page 43 of the catalog detailed the monthly cost of R449 x 36 months for the Dell Inspiron Core i5 with 10G + 10G and free wi-fi + Huawei LTE wi-fi router + Toshiba 1TB external hdd. I completed the contract in full and upon requesting the hardware I was informed that this was actualy a miss-print in the cateloge and I would not receive any of the hardware as details in the cateloge. Upon being informed of this situation, I immedeatly told the sales person that I was canceling the contract with immediate effect. This was not done! To make things worse, Telkom combined by existing Cellphone contract (of around R333 pm) to the new contract resulting in around R1230 pm. So Telkom has been billing me for the past 4 months for something that I don't even have. They have also now blocked by original cellphone despite me paying that contracts amount each month. In the past week I have received a bill from them for over R3000 for a package that I don't even have. I contacted the Customer center and they told me to complete a contract cancellation form, which I did. I forwarded this to Head Office, but to no avail. Please help me with this issue.