VERY BAD SERVICE AND FALSE PROMISES

I have had nothing but problems since taking a contract with Sell Direct. my phone was deliverd a month after I agreed to the contract. Then I tried for days to get my sim activated. Same probem when I tried to port my number. Then there were network problems.I was told to do a swim swop. Telkom said Sell Drect would call.They did, but a week later. I said I wanted to cancel the contract as I struggled endlessly to get through to Sell Direct and always end up having to call TELKOM for help.I was told by te Sell direct agent to hand my ohine in at TELKOM. At TELKOM I was told I have to get Sell DIrect to collect it as TELKOM does not take in their phones, He gave me details of the Sales Manager and someother manager at Sell Direct. I emailed both and to date have had no response. I want to cancel the contract as I have had no benefit from a contrcat that I am still being billed for