MTN Incompetence

I am being held to an expired contract against my will. Due to MTN's incompetence they are not allowing me to port my number to pay as you go so that I can change service providers. I have phoned customer services repeatedly over the last week only to be put on hold for over an hour to only then be told that the department is either not working or their phone lines are down, or cut off time and again. This goes against their own policies and that of the consumer protection act. This complete lack of service is completely unacceptable and if not dealt with will be taken further to DMA.