Disappointed at level of service

I had an upgrade done beginning of this month through Chatz Horizon and got really horrible service so I decided to call Vodacom directly on the 23rd October. I spoke to a lady (I don't recall her name) she did the upgrade for me and told me the phone would be delivered this week, Wednesday 28th October, the latest. I call the upgrade department today and apparently now there's no stock of the phone but initially the lady I spoke said there is So I still sit witb no phone. I really expected better sevice from Vodacom but now I'm just really disappointed and will not be doing any further business with them here after.