Unfair Billing

We signed a contract with Neotel in January of 2015 for our flat in Pretoria. They took two weeks to deliver the router of which I had to remind them more than once. After the router was delivered we had to figure out the set up ourselves, which did not work. We waited another few weeks until someone was sent to help us, again I had to remind them more than once to come do the set up. <br> <br> It took us more than two months to get any working internet, all the while being billed every month. We were promised (via email) that we would receive credit for the period we did not have internet. After finally getting the internet up and running, it was much slower than the contract stated. We then asked about our credit, but only received R200 of the R750 that we paid for no service. I asked that this issue be sorted out and said that I would complain, but have not received any response.