Terrible service from MTN and the courier company they use (DSV)

Hi I would firstly like to say I'm utterly disappointed with MTN. I have ordered a superflex simcard 3 weeks ago and I still have not received it. DSV waits for their convenience to deliver and that's not appropriate for a courier company. Yesterday DSV came to deliver and said that my proof of residence was invalid. I tried explaining to him that I live in stanger and durban and i still live with my parents and I don't have any other proof of address. He was very rude. However he has taken my documents and not given my SIM. That doesn't sit right with me I am unable to get hold of anyone from dsv I did tell him I could provide an affidave that was stamped by a commissioner of oaths and he said it will not be valid So I would like to please cancel my simcard as it doesn't seem like I'll ever receive it since i have no utility bills under my name and the only form of proof of residence i have is an affidaved from my mum to say i live with her I would also like a full refund because I have not used or received the simcard yet all I've got was troubles for it.

Thank you.