@Handyman It happens when an available slot can be advanced, but the obvious is can the customer accommodate that request, when not and stated sorry not suitable for whatever reason you would think sky would just not do anything but make sure the original was untouched, wonder if it may have to do with any compensation etc, sky then have no hesitation cancel the order and mark it up customer refused possibly which is way wrong, now you have to hound them for another date!
Did happen to me, OR accelerated the install from order to done 5 day's later, sky did call and say can you do, i said yes go for it, bit off a rush getting everything out the door sky's end but it all came together fairly well!
