Really unhelpful and inexperienced customer servic...

Really unhelpful and inexperienced customer service over the phone. I placed an order online 3 days ago and got a notification today that it is cancelled cause the item is out of stock. However online the item is still in stock. I called the customer service and they had no clue what happened, didn't offer any help just told me to order it again. Definitely not up to a level of luxury store. Not going to order from Selfridges again!