Amount charged not amount sold over the phone!

I recently received a call with an offer as a good customer from Sheetstreet/Mr Price to get an Tablet for only R99 per month.<br> <br> I had repeatedly asked the consultant if that is the real amount I will have to pay, as I am connecting to wify at home so I wont really use data and was assured that R99 per month was required.<br> <br> That will go off the 1 st of the month and I told agent my debit order must go off the 20th each month.<br> <br> I received the device and received an sms on the 20th October 2015 for inv 225071 &amp