Vodacom Services

I have a contract with vodacom for my phone and wifi rooter. I though have no internet connection on this rooter. I have been to their service department in Tygervalley regarding this. They offered to rectify this for R299. Why? I bought the rooter from them and is it not for them to make sure you have internet access before they sell it to you? By the way I still do not have internet access. I want them to rectify this because this is entirely not my fault. I also do not receive a monthly account from them. This month I was notified by SMS that I have to pay an extra R276(for what I do not know) and if I do not pay they will cut my service!! I think this is a disgrace. I am with vodacom for years already and was always satisfied but now I am thinking about switching to another cell phone company.