MTN PATHETIC SERVICE!

I recently upgraded my contract and for some reason all the calls I was getting were coming through as “unknown number”. I subsequently called MTN notifying them of this problem and they said that my Caller Line Identity was not activated. I was then told that it has now been activated and all I needed to do was restart my phone. It has now been 2 weeks, I have contacted MTN over 10 times, the matter has been “escalated” about 4 times now and they keep telling me to call back in 24-48 hours. Each time with the same outcome that I just need to restart my phone and it will be sorted. This is actually unacceptable i have a number if references from my calls, i emailed a complaint and also posted multiple complaints. The technical team keep trying the samething, then i get a consultant calling me asking to restart my phone it should work, and still the issue persists. I get promises of escalation etc. Are the technicians not qualified enough to resolve such a simple issue. This is my last resort at complaining. If i get no joy i will return my debit orders until resolved as i refuse to pay for a service that is not working properly and also dont get the proper client service to correct it.