No signal!!!!!!!!!!!!!!

I took out a new data contract with Vodacom last week, went to the bluff branch where they showed me on the system signal strength and that the router will be so fast because is 4G/ lte and I would not have any problems only to get home and not being able to download anything and not being able to use the wifi at all because of the bad signal. But I have to pay for the router. Secondly I can not even receive phone calls and if I get a good spot on a rock the conversation gets cut all the time. This is really bad service and I will not keep up contract if I cant even use the thing. Its like you guys make promises just so that the customer must take a contract. I phoned a few times only to be told someone will phone me back and never to phone me and repsonse will be 3 working days with one operator and the other operator says 14 working days. I am refusing to pay for something that I cant use and that vodacom promised me that I will have fast internet.