We rented a car from Green Motion Heathrow from July 14 to July 16, 2015. A tiny scratch on the rear-view mirror was not mentioned on the Vehicle Condition Report Form and was not detected by us . We drove on the Motor way and used our friends'car in Kent. We assume that the scratch was not done during the rental (but before). Green Motion charge us for a damage of £92 for this tiny scratch. We protested, we wrote many mails asking to speak to someone. We were unable to speak to anybody at Green Motion, and this company rejected any discussion/reduction/suppression of charge.