False advertising

Hi I upgraded my contract online yesterday morning at around 8 o clock everything was succesfull and went through and i even got a reference number P38K8G which is saying a call centre agent will be calling you sortly i waited until around 12 yesterday for someone to call me and decided to call 111 by myself to find out what is happening spoke to a lady and sorted everything out and she said to me that ill be getting my new phone the next day which is saterday. On saterday i call 111 again just to find out were the delivery is only to find out that they don’t deliver on saterdays and then the call centre agent said to me i will only get the phone on thuesday so my question is why will vodacom then advertise on the internet upgrade or buy online and get free next day delivery??