i want my number back

I have been using MTN sim card since 2006, 2 weeks back my sim card has been blocked for me not to receive calls or sms (my number is on prepaid ********** 949). I called 135 to find out the problem but I was told my phone is on call barring. She claimed she will fix it, before I hug the phone is said my phone is okay. after 2 days my phone was still the same, I called again they said my sim card has a technical fault which will take 7 days to be fixed or I can opt to do sim swipe of which I did. I went to MTN store in Pan African Mall bought a new sim card R5 and I explained to the lady and she claimed the sim card sim swipe was done by her. 2 days later my number is still not working I cant receive calls and sms. I called again they said sim swipe was not done. I went to the store explained to the lady again she said I have answered security question incorrect, she claimed is okay now. after a days or so I called again they said I must go and police station and make affidavit and certified copy of ID and take it to MTN Store. last week I did and went to MTN store The Glen with those things which they told me to buy another new sim card and I must switch off my phone for 2 hours after then it will be okay. but still I cant receive calls and sms.

Monday 27th I send them an email, stating all this but I haven't received any feed back from MTN

Why should I run around with something that is technical fault of MTN? My money for transport, money to go police station and money to buy sim cards. Which is not my fault, I need this problem to fixed immediately.