Eviction Help in MA - Trouble Tenant

[Adams Jean Baptiste]

Hi Everyone, 

I had 2 tenant (boyfriend & girlfriend) in my duplex.
They had/have a couple violations (noise/fighting, smoking) they have cause damage to the unit.
One of them (the boyfriend) decided to break the lease and move out in May. 
I sent an official lease termination letter (email & physical) to the other tenant letting them no that they no longer had a least and would like them to vacate the property as of August giving plenty of  to figure things out. 
However she has refused to move out. She is very aggressive and threatening to me and my family. 
She started paying in check payments instead of the cozy application. 

I recently sent a notice for rent increase starting in February (again giving her plenty of time to figure it out). She responded with a request to fix a crack in the ceiling and has not paid this month's rent. 
I explained to her that there's a lot that needs to be done to the unit and would prefer her to vacate. 

What's the next best step in this situation?