6 Days with no signal

On the 26th March 2015 I received a MTN LTE Sim-card, via courier. Which was prompt and convenient? <br> <br> Admittedly, I did not activate it straight away. I received smses every day reminding me to do so. On Thursday evening, 09 April 2015 at 6pm I started the process.<br> I followed the very detailed instructions that accompanied the new sim-card.<br> <br> As per the instructions, I waited for my old card to become inactive and inserted the new card at 9pm on Thursday night.<br> <br> The new sim-card does not work and my old sim-card is now inactive.<br> I waited the whole of Friday and went into MTN Pavilion on Saturday and a request (REQ:***) was logged. I was assured my phone would be back on by Monday 20th April. It is still not working and after numerous *** calls, I am still none the wiser. <br> <br> I do not know what the next step is