Hey come on, head up…together we are surely able to fix that… 
Seeing the picture below they should know what do do, if not - go to the next shop.
http://picasaweb.google.co.uk/Human.Amp/StridaTech#
(Pictures by Human Amp)
To adjust the brake pads please refer to the owners manual, page 17.
http://www.strida-europe.com/english/images/Manual%20Strida%205.x%20and%20Strida%20Mini.pdf
Might somebody affirm, please?
Thanks!