Reference # 489324846: Upon returning our car to airport in Madrid we were told there was damage for which we must pay. We indicated both in person and in writing "Addendum and Statement of Vehicle condition" that we do not know how the scratches occurred on the front passenger side bumper nor were we aware of any other damages anywhere on the vehicle. We also saw them and documented them as normal "wear and tear". Neither the clerk nor the person who reported the damages would discuss the issue nor refer us to someone who could assist. English language comprehension was difficult and we were told we needed to pay in order to leave. Additionally, although we were returning the vehicle a day early and had been told upon pick up that we would be credited, we are not certain of the evidence of that credit. We are disputing the damage charges and the additional day charges. We agreed to the additional driver charge and the vehicle upgrade (as the regular daily rate had been paid via Capital One Rewards) for the dates of February 20-24. Thank you for your prompt assistance in this matter.