Router network problems

I took a 3 year contract router with VODACOM that I am un able to pull out of with out paying penalties. I am paying the full monthly contract fee with the router that does not work 50% of the time and when it works its slow with un clear picture. I do not know how many times I called their call centre who couldnt be bother and been told its escalated to the network team who never calls. How can I be told of the traffic on the network when I want to use what I am paying for. I an in city centre and was told that there will be full coverage for this thing. I am so annoyed with this service provider.