Rentokil employee damage my car in parking area.

On Monday the 15th of July at around 14h30, I was at Jackal Creek Shopping mall. A Rentokil staff member parked in the parking bay next to my car and when she opened the car door, the door slammed into my passenger door. This left a scratch on my door. She mouthed the words "Sorry" to me and walked away. I was busy with an important call and couldn't interrupt the client. When my conversation ended I left a note on the car to contact me but nothing happened. I wrote a message on their website and received a call from their call centre. I gave the car registration etc but haven't heard from anyone since then. I wrote a couple of messages on their website again requesting feedback but no one responded.