Vodacom online

I phone vodacom online on the 9/12/2018 to upgrade my contract. The upgrade was for laptop with wifi router. On 11/12/2018 they delivered one item wifi router. I called to inform them that I didn't get a laptop, they told me that the consultant made a mistake and she will rectify and send the outstanding order. I have been calling them and no one was willing to help me. They always say that the matter is escalated, someone will call me. I have never recieved any call from them. I called them again to cancel and return the order because I have been waiting without any feedback from them. I spoke to three consultants who told me that RAM will send me sms to collect. Nothing has happened, I have never seen such a bad customer service. I don't want to do upgrade anymore. I want to cancel the contract and never renew it again.