NO RESPONSE AFTER MULTIPLE CALLS

I have called Vodacom on numerous occasions in the last month to try and get hold of someone who can help me regarding a contract reversal. I asked to have them listen to a call that was made in the past to confirm that the representative concerned assured me that I could add a phone to my contract during the term of my contract. I had people tell me they would get back to me but no one has done this. I also asked a manager to contact me but there has been no response. I cannot keep waiting for someone to respond and I am tired of calling them myself. They are the service provider, not me. <br> <br> I would like a manager to contact me who has the authority to listen to past calls and to actually provide me with feedback so that I can correct my contract as was stated to me.