Bad Service Eldon Auto Body and Bad attitude from Shaun's boss

Bad Service and Bad attitude from Eldon Auto body, Shaun's boss he's unprofessional, he treat clients like trash, I went to collect my car that was towed by them for repair, on my arrival i found my car with scratches that was not there when they collected it, and they dont want to take responsibility of the damages, when they took my car on the 31st July my car was having petrol but today when i collected my car was not having petrol it only allows us to drive 1km,on the 28th of July 2020 we poured full tank on my car and on the 31 July my car was towed with petrol meaning they empty my petrol and now they are denying. I have proof of petrol payment, and we can also ask car tracker to show the vehicle trip of my car from 28 to 31 July, Im angry right now. They cant damage and empty my car petrol like that.