Delayed Order -now Cancelled with no explanation or notification

On Nov. 29, 2013 I ordered a well spec'd XPS 15 laptop with a delivery estimate of 12/27/13.  Long story short -after two delay notification emails, the last one asking me to explicitly click on a link to accept the new delay and NOT CANCEL (which I did, and received a confirmation that the order will continue), I go onto the website to find out my order has been cancelled.  After two hours of talking to customer care and getting hung up on three times, I chatted with someone in sales which could provide no help, but tried to sell me a similarly spec'd, newer XPS for $1000 more.

First of all, I want a real explanation why my order was cancelled.  Secondly I want a similarly spec'd laptop for roughly the same price.  Who else can help? Is there a real department that can do something?