Sorry to hear you guys have had problems with this UK seller.
I had never heard of Fitzpatrick Models

I can mention some reputable UK shops which drivers in the UK only have good things to say about and which I have used myself;

http://www.microtechracing.com/
http://www.modeltech.co.uk/catalog/default.php
http://www.modelsport.co.uk

And last but not least, my sponsor ;

http://www.apexmodels.com/