Game online

I placed an online order at Game online on the 6th Of March for a defy fridge, Friday i followed up via email and the guy told me it should be delivered on Tuesday. today i make a call to check and the lady tells me that my order is still open and they have no stock!!!! why do you allow for an order to go trough if you don't have stock!!!. If i want to cancel i have to wait for 3-5 working days, this is an added 5 days to to the 6 days i have already been waiting for the fridge. Terrible service and terrible customer service as clearly the consultants do not know what is happening if one gives one story and the other another story. Please get in touch with me ASAP!!!