MTN -CONTRACT CALL CENTER- WORST SERVICE

I called the call center for contract phone on a Saturday to report my ****** device, first consultant told to call again because the system is not working . I end speak to seven consultant where Sipho Nala could not blacklist my device telling me that I am giving him her wrong ime number ,he was very rude and refused to transfer me to floor manager as he claim that the ime number on my device box does not match with the one on the system, whereas at first he claimed that system is slow. I called for the 8th time and I got a lady whom assisted me with the same IME Number I gave SIPHO NALA. She was off as well, I mean I don't derseve to be serviced by rude and *********** consultant when I am actually billed every month to get the best service