Paying a monthly fee but modem is not activated!

Hi, <br> <br> I have been trying to get hold of SellDirect for over a month now. After following the voice prompts and choosing the correct option, no one answers or the call disconnects. <br> I am paying a premium of over R500 a month and I cannot even use my modem because it is not activated as yet! I am therefore paying this premium for nothing. <br> <br> My contract was initially with Telkom Mobile but now they have said that they are unable to assist me, as they cannot do anything on their side. <br> <br> Can someone please assist me? I really did not know that it is this difficult for your customers to get their sim cards activated.