Poor vodacom tele sales customer service

I received a telesales call in Nov 2014 and purchased a tablet. When it was delivered the next day I discovered that it was not a tablet but instead some wife modem. I did not open the packaging and I immediately called to report that the incorrect product was delivered. I received a reference number and was told someone would collect the item within the next 5 working days. I have since called numerous times, received various reference numbers and have even gone into a Vodacom shop but was told that because it was a tele sale, I had to return the item through the same company who delivered. I am still in possession of this incorrect product and have been paying the contract ever since. I am sick and tired of being pushed from pillar to post with empty promises. If hello Peter cannot help me then I am taking this to the newspapers. I am a loyal Vodacom customer who has always maintained 2 reasonable contracts with Vodacom. All I am asking is that somebody come collect this incorrect product and refund me the money I have been paying for almost 15 months.