Its Tim Whiting, CEO, Phones 4U. No email address that i can find on the internet - no surprise there, none of them do if they have any sense.
However, i did just have a look on www.complaintcommunity.com and they do seem to have phones 4 u as a listed complaint organisation - means they have got the contact details for phones 4 u.
The site lets you post your complaint and then submits it to the company behind the scenes - then (the good bit) the company can manage your complaint with you online using the system. Its a new site but its pretty cool! It also seems a professional site, not the usual ranting site.
I have used it already and it seemed to be pretty good (I am part of a groupcomplaint with the NIA exhibition centre - pretty cool, you can join with others with the same complaint).
If i find any more info on the email address, i will let you know.