Vodacom made an upgrade on a product I did not want

I am utterly disgusted with Vodacom. One of the agent made me to upgrade to one of the products I did not want. In fact before it was even delivered whilst I requested for it to be cancelled. I even logged for it to be way before it was to be delivered. I called to for it to be returned I was given the reference number but now instead it’s automatically upgraded without my consent , while stupid me is waiting for the product to be picked up by Ram. I know longer want the product and utterly disgusted and disappointed. Intact before it was upgraded i did ask the agent if I could return and he assured me that yes I could but now I’m surprised over two weeks nothing has happened.