Selldirect unreachable after device delivery

My current data contract with Telkom Mobile expires in June this year (2015). I was called by Selldirect offering me an upgrade, to which I agreed. The device was delivered with the 7 days as discussed. Unfortunately I've been sitting with the SIM and modem with no way of activating the SIM since the phone is never answered by Selldirect.<br> I've called countless times already to no avail, even sent a mail. I'm within the cooling off period, and now I want to tell them I do not want their upgrade any more. I see so many complaints about their service I actually regret saying yes to the upgrade. <br> <br> Please come collect the package as I do not want the contract any more!! If I get billed because Selldirect ignores calls, I will take further action.<br> <br> Teboho.