I just received an answer to my claim after exactly 24 hours and I am very happy with it :-) Approved!!
Hotel: Radisson Blu Scandinavia Düsseldorf (3 nights / 2 business class rooms during New Year)
- Total price for my booking on the Radisson website : €963
- Total lower price on other website : €639
- New Radisson price after BPG claim : €479,22 (average of €79,87 per room per night)
That's less than half the price of my original booking!!