VODACOM IS THEWORSE CELLPHONE NETWORK

I requested an upgrate on my cellphone in the beginning of February online. When I received the phone VODACOM gave me a new contact. I contact VODACOM and asked if it can beswitched to an upgrade apon which I was informed that it cannot be done and I have to send the phone back. VODACOM arranged the pick up and told me to phone in three days to cancel the contract, which I didand VODACOM confirmed that they received the phone. Vodacom then again told me to phone in three day to confirm that it was cancelled. which I did and it was not cancelled. THey ecallate it and told me to phone back in three days. This is after almost 2 month still going on. I am now receiving SMSs from VODACOM telling me I am in arrears and that they are going to diconect me. I went to the Vodacom store in Somerset West Mall and thet told me they cannot do anything because they are only a frenchise. I will advise any one considering Vodacom to find another cellphone provider. This is really unacceptale. I m in an shouting match with them now every 3rd day and still nothing is done to resolve this problem. I denammed prove that they are working on it and did receive a call numbe via SMS. But when I phone nothing happened.