no response to added amount on bill for more than

In the beginning of October I went in to a telkom store again to cancel my tablet 's 500mb which they did. 2 weeks later I received a call from telkom customers service confirming the cancellation. This happens before the 14th October 2015. The tablet and 500mb cost me R129. Start November I received my new bill. Now there has been added R185 added for tablet and 500mb Internet. I phoned customer service on the 4th and they told me but I took a new tablet and 500mb data which I didn't, as I haven't signed or verbally agreed to or received. They told me that it will be sorted out within 72 hours (9th Nov) and will receive a call to confirm. On the 13th I phoned again and demanded that a manager from the accounts department must phone me. They promised me that I will receive a call before COB on the 13th. It's now the 16th. Who will be paying for this tablet and data which I didn't excepted or received? If I haven't received a response via phone call and a confirmation letter there after which states that I am not liable for this payment, I will be going to court as this is ***** and against my human right to add something and make me pay for it but I didn't agreed on. <br>