Vodacom Fail

Since March 2021 I have been trying to resolve a problem with my number on the Vodacom network. I have traced it to be when clients or friends that are the Cell C network call me, they get a response to say that this number does not exist and when I call them back from my phone it works. I have called the call center multiple times and been in store twice. As of Monday the 10th May 2021 I will be moving to MTN. I cannot afford for clients not to be able to reach me on my number and Vodacom has failed to resolve the issue they have on their network.