What have they complained about?
keep a journal and date every event.
don't do anything in return for you guys will be held so accountable
talk to whoever you are paying of the events and let them see to the matters.
Do everything in your power to **** them off
Make them really uncomfortable. Be super nice to them, and confuse them with out nice you are, and when they see you with your friend, kiss your friend on the lips and turn back and wink at him. That dude will forever avoid talking to you cuz he thinks your hitting on him.
Slash his tyres
Oh, is that one of those Australian colloquialisms? Does that mean, "Throat?"
No. tyres means.... Tyres.
Oh. It makes more sense to mean, "Kill him, mount him, and make an example of him."
Call the police.