No follow up

I wonder what the owner of the Vodacom shop at the glen does to do business. Three months ago I went to the shop to renew two contracts. Apparently they did not have stock on the phones I was looking for The staff took my details and said they would call as soon as the stock arrived. I never got a call. I proceeded to take out two new contracts from cell c. I cancelled the two Vodacom contracts. Then two weeks ago I was at the glen and enquirer about a upgrade for my main contract. My main contract is more than R2500 per month. At this point the server was down and they could not help. They said they would phone me to confirm upgrade. So they did. I received a called that I can upgrade and they would phone me when the stock arrived. Now two weeks later still no call. How do we keep accepting bad service even from big corporate companies. This is shocking service and I would advise people not to even consider visiting the Vodacom shop at the glen.