Won't connect me!!!

I regrettably agreed to a telephonic offer from Vodacoms Rewards company for a wifi router! All sounded too good to be true. Well it was. Endless phoecallsand time spent wasted on the phone and nobody can connect my SIM card. I even spoke with a supervisor who promised to call me back (3 days ago and I'm still waiting). Their service is shocking and cell phone reception even worse. The last time I had a problem with Vodacom this was the only way I could get any assistance from them. I have now had this router for 3 weeks and still I can't use it. Once again Vodacom is going to bill me for something I cannot use.