Europcar ********** damage claims

We hired a car from the King Shaka branch in Durban and did the customary check on the vehicle. The assessment is a walk around the car, that DOES NOT include bending down to check the under of the car. Upon our return, an assessor walked around our car and noted there was damage under the front bumper. He claimed he could see the damage while standing upright on his own, which I expressly told him, no, it is not. He specifically knew where to look, without bending down or anything. IT IS NOT possible to see this damage AT ALL when you are standing upright. We were not in any accident nor did we hit anything, which we very clearly told the assessor. It very clearly was an old dent (no fresh sc****s or residue or anything) that was clearly as dirty as the rest of the car. We were told to fill out a report, which we gladly did, as we were not responsible for any damage. Only to get a claim a week later, with rings around unclear blurry images that DO NOT show any damage, for R6000+! This is not on, I have seen other complaints of this sort about Europcar, disgusted as someone is obviously trying to blame us for a previous dent on a car.