Failed to activate my swimswap simcard

this serves to register my grave concern with regarding to poor and bad service that I received from MTN.<br> I bought a Tablet from MTN Carnival Mall, Brakpan in 2014 on contract, where MTN must provide me with 1GB, data bundles on monthly basis and they will deduct R209 monthly from my bank account. My contract cell no. ***(problem no) On the 04/09/2014, there was a break-in in my house where burglars ****** my tablet, went to police station on the 05/09/2014 to report and open a ******** case and further block the phone. In December 2014, I approached MTN for swim-swap and they process it, and in January 2015 , I realised that the new simcard is not working and went back to the branch for assistance , they gave me a new one , the same thing happened. in short, their sim card never worked and I last visited their branch on the 08/06/2015 for the same problem and they check the problem but could not pick it up.<br> They ended up giving me the 5th simcard, the very sim card is not working , when I put it on my modem, always say \No Service"I feel aggrieved and prejudiced by their level of service"