poor service

As a loyal Customer with MTN for the past 4 months I had to call and complain every week.I am on top-up 100 contract with MTN ...but I can not call the *** number as I need information regarding my contract I always have to call 173 which take's forever to get an agent to transfer my call to the Billing/contract department.I'm sick of all the agent telling me to Reboot the phone and tray again its not working.I still can not make calls to *** as it give me an era :THE NUMBERS IS NOT ALLOWED TO CALL *** AND TO CALL 173...when I call 173 they sand me the SMS to call the 083 number this is irritating and no one at the contact center is willing to help ....of lately it take an our before they answer the phone or it cuts you off