Builders Warehouse - Online Purchase - Still nothing delivered!

I wrote a review a week ago regarding my unsatisfactory online experience at Builders Warehouse. The very next day I got a response - Sorry, we'll sort this out. Delivery will be this afternoon (Monday) or definitely tomorrow (Tuesday). Nothing! On Tuesday afternoon I received an email - Are you happy with your purchase? - I responded that I hadn't received it. Wednesday I received another email from a Customer Service Consultant. Apologies - will be sorted out. And another e-mail - looking into how the problem arose! It's now Sunday evening a week later. I have NOT received my order. How is this possible?