Poor service by VODACOM

My phone contract was ended and I was phoned by an agent to ask if i wanted to renew my contract and do an uograde I said renew the contract but no upgrade as my phone is still working well. I received a contract ststing that I had requested NO upgrade yet I was charged R149 for an upgrade. I sent an e-mail regarding the matter to Vodacom everyday for a week without a reply and then sent 5/6 everyday for the next week still no reply or acknowldegemnet of e-mail. I told them that if this as not rectified I would close my account which has been going since cellphones started and move to another service provider. Still no reply. SHOCKING service to say the least.