Vodacom poor service

I have upgraded my router contract and took the x-box 1 that comes with a router and 40gig,I waited since the 24th March to date. I am the one who have been contacting them since and got no help until today where one colleague said he will ask someone to call me back... then Aubrey from confirmations department called me today to tell me that the offer has been discontinued. Like how can that be whereas when I ordered they had many in stock. I have been a loyal customer to vodacom to be treated this way. I promised the child an Xbox since his birthday and today there isn't any delivery but to be told of discontinued offer. Kindly assist on the matter