Locksmith damaged my vehicle

My wife took our vehicle to Derek's Locksmith to have four new door handles fitted. Derek battled the whole afternoon to fit them, so he agreed to come to our house the next day and fit the door handles. Derek did arrive the next day with a Black helper and we left them to install the new door handles. I could not supervise Derek, as I was busy. After a while the door handles broke and this is when I noticed that Derek had drilled holes into the doors and that he fitted the door handles using self tapper *****s. I also noticed that he had bent one of the door panels. I confronted Derek and he replaid by saying that he would fix the doors using pratley putty and paint. I insisted that he buy me 4 new doors, but he refused. I reported Derek to PSIRA and LASA, where it was discovered that Dereks's locksmith was not even registered. Avoid dealing with this man as he is very arrogant and could possibly cause damage to your property.