Bad service

Really disappointing in the service received at Vodacom. I called Vodacom two weeks ago for a upgrade. Twice I was told by a consultant that they will contact me back with possible upgrades. I had two wait almost 5 days. When I finally was called back and my upgrade was done over the telephone and I confirmed the upgrade via sms, I was told that the confirmation department will contact me to confirm the delivery of the phone. I called vodacom now three times in a 7 day period and I still have no one that can help me. Every time I phone and speak to a consultant I am told that they will make sure someone phones me back. How many times does a person need to asked for a call back and all of this after I told Vodacom that I was planning on going over to Cell C or MTN as I was not happy with their service. When I phoned yesterday, I said to the consultant I want to speak to the manager. The Manager promised me that I will receive a phone call back. Still no call and I had to call again today, but no one can help me. I am totally disgusted and shocked!!!!