Port to another service provider- not an option

I woukd like to port from Standard Bank Mobile to Vodacom. I've been struggling for more than a week to do so as Vodacom keeps advising that the number I want to port ; is still being serviced by Cell C. After numerous emails to Standard Bankmobile support, they cannot explain why the number cannot be ported..only that they cannot find my request to port. Another email with screenshots of request and still no feedback. poorest service ever. And then they want me to call them if I need to speak to a consultant