Shocking service

In spite of numerous attempts to upgrade, as well as visits to the branch and telephonic conversations with head office, I am still unable to upgrade due to an error on the system at VODACOM. I keep being assured that the correct information has been captured, but each time I try to upgrade the same error is on the system at VODACOM. I am now at a point where I wish to cancel my contract and move to a better service provider. This type of service is shocking and a very bad reflection on one of the biggest service providers.