Delivery on On-line order

I place an order on 04/12/2017 which is a Christmas gift for my daughter. When placing the order, it said 'standard delivery 4 - 7 days'. The payment went off my Credit Card within two days. After numerous e-mails, I phoned this morning as it is two weeks since my order and I was advised the one item is holding the order back. I cancelled the item and the agent advised me she has add the re-order for overnight delivery. I logged into my account, the re-order is there, but it says 4 to 7 days delivery. This is NOT on, I need the delivery done by Wednesday 20 December 2017 as I'm going on leave. I am not happy with the whole situation as they shouldn't say 4 to 7 days delivery if they know they are busy. And the fact that nobody let me know that the one item is holding the order back is also not on. I tried to phone the Call Centre now, but was cut off twice. I am really not happy with Toys R Us and if this doesn't get resolved or I get feedback by the end of the day, they are losing a loyal customer. I NEED THIS DELIVERY DONE BY 20 DECEMBER 2017!!!