I used them last June to buy my Philips TV. At that time they were easy to raise on the phone and did answer emails, maybe they have gotten much busier and less slick. Although I typically called them in the morning about 11:00am so maybe they are quieter at that time.
I waited about 3 weeks for my TV (which they had warned me about), but when they did commit a delivery date they did stick to it. They are a well established, reputable company with outlets across Scotland so you will get your player (eventually).
Keep trying, here's some contact numbers if you don't have them already....
Mr David McDonald, Internet supervisor... 0800 052 1425
email...
info@robertsons-online.co.uk
Head Office... 01505 572000, Fax... 01505 572001