sms not working call not coming through

I have had my Cell C line for more than 10 yrs now then Cell C decided to migrate me to a supposed better network without my concents. I thought Cell C was POPI compliant!!. Then since the migration I have not been able to send or receive sms and also receive in coming call. We have to sort it out with customer care agents to avail. The agnet even trasfered to to technical who lie they will contact me but they dont. I have opened several cases with them in the nema of esacalation yet nothing happens. They give a direct line to call technical and each time it takes back to customer care. They technical agnets know I cannot call or receive call yet they claim when i follow up that they called and didnt find me so they left a voice message. How do I receive all these yet they are aware I can receive calls or sms? What is going on here? The latest case number is ***