Getting Rid of Mice?

I need a recommendation for an excellent remedy for mice. We have a rental apt. in a brownstone and have been plagued with mice issues pretty much the entire time. Landlord continues to use an ineffective NYC exterminator. I have several months left on my lease and I need to get rid of the mice problem once and for all even if I am stuck paying. Please let me know if you know anyone who can get rid of them for good!