Non Delivery on goods

I was contacted towards the end of July about a mobile router. I agreed to the supply of it but as I would be away for the month of August could they please deliver in September. I was debited on the 31st August for the amount of R99,00 and received a phone call on the 1st September from RAM to arrange delivery. They read out my name and initials and I told them they were incorrect. They said they would get back to me as they had to reconfirm with Telkom. To-date I have heard nothing and I wish to cancel my order.