Get 500MB when you switch to LTE

I got this message from MTN \Get 500MB FREE Data when you swap to an MTN LTE SIM for superfast internet speeds. Get your LTE SIM from an MTN Store then SMS "Swap\"" to 44770 from your current SIM and follow the prompts. Ts&Cs apply\"" i bought the LTE sim and followed what the message said. But I haven't received any data from MTN. I called the 173 number for assistance they took my number and previous slim number and the new sim number I was <br> Told my query was escalated to the supervisor on (21/04/2015) I was told to wait for 2-24 hours. When I called them today (22/04/2015) they told me my query was not escalated so I had to give my details again and I was told that it will take 2-24 hours again the most disappointing thing is that the so-called fast Internet it has became super slow. """