Poor service

Very poor service from vodacom store mams mall

I went to Vodacom mams mall and I was assisted by Walter to upgrade my contract to a laptop on 21 March. The laptop deal was R600. They told me after finalizing paper work that they don't have stock and they will receive stock on Wednesday the 25 March. I called on Thursday 26 March they said still no stock. I called again on the 1st April and they said they will call me back. I later received a call to inform me that my laptop has arrived, I should come and collect it on 2 April because their system is off line. I went to collect my laptop on the 3rd only to be told that the March deal of R600 is canceled now is the April deal of R660.They refused to give me the laptop with the deal that I have signed for, which is R600 pm not R660 pm.