Before you do anything, you might want to try the stalking method. I've had excellent luck with it. Get some heavy clothes on, and go out and stalk him. Just keep him moving, moving moving. Do not ever take a step back. Just go out there and stalk him for like 10 minutes once or twice a day. until he stops. I've even had my granddaughter go in and stalk a silkie roo. She ended up loving him the most. I think hitting them with something just means a challange to them, I don't do it.
Do they charge you to start with anyway? I am assuming that is why the heavy clothes?