Cannot Receive Calls and Messages

To whom it may concern, I have taken up a new contract with MTN, but unfortunately I have been inundated with issues from the point of inception. Firstly it took me 5 days to do a sim swop and secondly its now been an additional 5 days and I am unable to receive any calls or receive any messages. I have logged this complaint on different platforms in the hope that some one will be able to attend to or at least fix this problem. The refection of the service experience is clearly appalling. I have misdirected, miscommunicated to, and **** to. The nightmare of not being able to receive calls is horrific, whether work or personal. Please MTN, surely someone can assist.