Smses not working

<p>A month and a half ago my cellphone got ****** of which thereafter a sim swop was done. Since the sim swop is done I can no longer send messages (smses) . I called the 08211 call center and each time I am told the fault is escalated and till date no response and I am highly unhappy as my phone is used for business purposes if this goes on I will be forced to cancel my contracts and move to another service provider </p>