POOOR SERVICE

10 March I was busy on a call when the call dropped and the voice robot tells me your airtime is exhausted, so I purchased more airtime from my banking app, and when I tried to make a call, I keep getting, you have insufficient airtime to make a call, which is very frustrating, I called the call centre, of which they "refreshed" my number, which didn't work, after many calls, I went to the KeyWest branch, just to get the same result, they even tried to do a sim swop and still the same result, I then drove the the call centre on Constantia and the consultant managed to fix it temporarily by loading 25 free minutes, but after I have used up the 25 minutes, I still have the same result, on my phone I have R242.39 airtime, but I keep getting, YOU HAVE INSUFICIENT AIRTIME TO MAKE A CALL!!!!!!!, NOW MY QUESTION IS MTN WHAT DID YOU DO TO MY NUMBER????? I can't use it, but I must PAY!!!!!!!!!!!!