Bad service at Vodacom

Hi my experience with Vodacom online has been hassle free on my first 3 contracts, but now it's terrible. I app**** twice online for the Vodacom tv special that is advertised on the website, when the agents phone, they say the tv is not available or try to get me to take a expensive tv than the one advertised. Unfortunately I do not have the names of the consultants that I talked with. My last straw was Vodacom inside Game store in King Williams Town. Went there on Sunday to renew my contract, the lady said I can only do that on Wednesday as the person working there is off till then. An this is also not my first encounter with them, they give you every excuse not to help you. I mean does this not benefit them and the company when taking out new contracts? Or should I rather cancel my contracts with Vodacom and go to a service provider thats better with customer service.