Delivery of what I did not ask for

I requested an upgrade on my data contract on the 17th October, what I requested from the call centre agent was an indication of the size of the instrument because I was actually upgrading a Galaxy Tab, which I could not upgrade with a phone because I do have a contract phone with Vodacom. I requested Vodacom on the. I received the package on a Friday and the next Monday they were supposed to send the courier company to fetch the package because I was also promised a portable wifi router which I did not get. Now Vodacom has started billing me for something I did not ask for. One would not expect such from a big company like this.