Incompentant staff MTN

I have cancelled my contract on Thursday the 23rd and my number was moved from contract to pre paid. Since Thursday I cant receive calls. I have been calling the customer care every day and get empty promises. Surely the staff at mtn doesn't know what they are doing. the consultant keep on saying the number is still under elula which is the new system and the system doesn't allow them to access information. I am really ****ed off as I am using this phone for work and I am not getting any help. My number is *** Annoyed