Here's another option that saved my life. Might work for you.
Back in the '80s when I lived in rural CA, we had a family of skunks move in under our house. It got to where they were "letting go" a coupla times a week and we got real desperate. We called everyone in the book. Exterminators, animal control, police, everyone. No one would help us. Got so desperate we called everyone again.
Finally, my wife got this little ol' lady (or at least thats' what she sounded like) who told her "Hon (I love that. Hon.) Here's what ya gotta do."
"Send your husband out at 4am, when they're likely to be out. Have him carry a radio under the house. Not a battery radio, a plug-in radio. And an extension cord. Hook it up and set to play as loud as you can without bothering you in the house. And no classical music. We're talkin' hard rock, hon. In a few days, retreive the radio and patch the holes they were using to get in."
It worked for me.