Phone, Simcard but no connection

Sell direct has provided me with a cell phone and sim card on behalf Telkom. I was advised that I would have to pay R90 fee for the credit assessment, this was not initially communicated to me when I accepted the offer and this is the first time that I have ever had to pay a company to assess my credit history (especially when you take into account the fact that Sell Direct approached me with the offer). I agreed to make the payment and I have received the phone and sim card, however 4 days after being contacted to activate my sim card I am sitting with a phone that has no network connectivity. I have no means to reach either Telkom nor Sell Direct.

I want to cancel the contract. I will pay for the handset if I have to but I am not impressed and do to want anything to do with the third part contract.