Bugaboo frog needs repair

I need to know where to repair or to order some bugaboo items in my area.
I have broken the articulation that enable to swing back and forward the seat.
Actually while I alighted to an underground station the forewheels dropped down into the gap between the train and the platform and got stucked. The train was so packed that I couldn't even see why I was not able to push the pram anymore, so that I continued to push and the compression strengh onto the wheels went to the articulation and this one broke.
My name is Jerome and my postcode is SE10 8NG.
Thank you.