Disappointing service from Vodacom

I have been a customer with Vodacom for years. I spoke to someone at Vodacom about 2 months ago and upgraded my contract. I later found out that the contract was not upgraded as per the agreement with Vodacom. I have been trying to get Vodacom to resolve this since about a month ago with no luck. I contacted them via Facebook and there is still no luck with resolving this issue. Very disappointing Vodacom!!!