Revenge?

[FartinMowler]

I have a contract to do work on a home and a nieghbour of this customer is fueding with him and I have been put in the middle and wondering what to do..Yesterday I went to do work on the home and when I came out I found the inside of my vehicle full of dry grass and because I had problems with him before I called the police non-emergency number and they sent an officer over and he told me that there is nothing I can do unless someone see's this guy in the process of doing mischief. I have one month left on this contract and don't want to dump it because of this jerk and I keep thinking of revenge but this would be stooping to his level right?