Charged R8000 for their own faulty car

Do not hire from this company. The car I hired had a faulty car door and they have now charged me R8000 for the damage. I have a video to prove that is was already faulty. I confirmed before handing the car back I would not be charged (twice). They did not even give me the chance to respond or fill in the claim form. I’ve chased but no response via email. This is disgusting!