Not able to receive any phone calls on Cell C

For more than a week now I have been battling with Cell C to get my network sorted out in order to receive calls. I have on multiple occasions been in contact with the technical department to fix the fact that the only time I am able to receive phone calls and sms messages is when I am connected to Wi-Fi. And even sometimes when I am connected to Wi-Fi I am not able to receive calls and sms messages. They keep telling me it's a migration problem. We have manually changed my settings, and still nothing.

Not only am I a mother who needs to be contactable at any given point in time in case of an emergency, I also receive business calls on my phone. My calls all just go directly to voicemail.

What happens when I can't pay my accounts with Cell C at the end of the month because I have lost business as a result of their negligence and incompetence? Will they let it slide? NEVER!!! I have been a loyal customer with Cell C for many years, with 5 contracts currently running with them, but at this point in time I am seriously considering just canceling all my contracts and moving over to a more competent service provider, but again, will they allow me to move seeing as they can't even provide me with the service I am paying for?! Probably not!!!!

I am so unhappy and extremely angry about this situation that I could actually just scream! I am considering taking this to the relevant ombudsman to explore what my legal options are!!!!!!!!!!!!!