What do I do if I have broken lease due to safety concerns more than two years ago and now I am being sued?

I lived in an apartment almost 3 years ago and broke my lease due to safety concerns. I notified them of break-ins in my apartment, neighbors dealing drugs, and their maintenance man would come into my apartment daily without notification in doing so, and would also sexually harass me. I gave them 60 day written notice, paid in full through the next month, had a verbal agreement, and the unit was rented to someone else once my paid in full month was up. Almost three years later I am being summoned to court, and all their lawyers will tell me is to get a lawyer.