Poor service at CPT international branch

I rented a car from 24th to 27th October. When I returned the car it was inspected in my presence and I was given the ok from the inspector that the car was fine. A few hours later I got an email claiming that there was damage on the tyre. I did indicate that this damage was on the car when I received it. Manager Jaco Von Molendorff claims that this is fresh damage. I have no idea how he can identify fresh damage when I only had the car 3 days. In my last email I did ask him to call me as I was tired of the emails back and forth. This email was 3 days ago and still no call from him. My gripe here is that he claims that the car would not have been sent out with damage. Really? How is that your inspector missed it in my presence? That car was later driven and moved after I left. Just like it probably was driven after the last customer left it. So there was plenty of gap for that damage to be caused and missed. What's the point of having someone inspect the car in my presence if you gonna send me an email after I have already left to say there is damage. What's even worse I never signed any incident form but yet the money was taken off my deposit. Is this not THEFT? Europcar I want my money back and you need to train your exit staff better.