No Delivery

I ordered a Samsung tablet as a Xmas present and as the Dion Online website states "Our delivery promise is 5 - 10 days", I was confident that it would arrive before leaving on holiday. We are now leaving tomorrow and still no tablet. I have spoken to Customer Care agents on 3 different occasions this week and all they can say is the order is still waiting to be processed and there is no way of knowing how long it would still take. This is unacceptable as Dion is writing Delivery promises on there website and don't even send a sms or email to let know they will not meet this.