I've got two numbers, can't remember which one I used when I needed to speak to someone...02089298600 & 02089298800... if not correct ask them to put your through to Fiona (I guess)
The two people the interviewed me said they are so busy because of the number of people who applied! But said to make sure I follow it up if I don't hear after 2 weeks, so I'd give them a call.
I would not have been as patient as you, 7 weeks is a long time!