Pathetic

I left Autopage (MTN) a year ago. I've been with Telkom Mobile since then. In Feb this year someone WhatsApp my wife saying that he (Autopage customer) bought a tablet from Autopage and was given her number (SIM) for the tablet. Even through we've been on Telkom Mobile for a while now, and ported, we are having issues since this man went and bought the tablet at Autopage. My wife can't receive any numbers from anyone that tries to call her from the MTN network. This is a huge inconvenience as her mother uses MTN and all SMS's and calls are routed to the man that bought the tablet. Also, any PIN's and confirmation codes are sent to my wife's phone for apps this gentleman registers on his tablet.We've asked the gentleman to resolve these issues but to no avail. He has often responded that Autopage are unwilling to help. I've seen the responses he has sent my wife and its being going on for months now. I eventually went to visit the Tygervalley branch to seek help. The advisor (Carl Parks) assured me that he could help as I initially want to speak to their manager to escalate. To date, I've received numerous calls from Carl with no real resolution in mind. Please HELP!!!