If my neighbor's bushes overhang onto my propery can I cut them?

my neighbor has bushes that run along the propery line. He contacted a lawyer in april and said we enproached upon his property when we didn't so he was told not to come onto our propery. Since then he has not trimmed the bushes on our side and now they are starting to interfere with my propery and look awful so I was wanted to know what I can do about them without letting him on my property.