Do we have any legal action against the landlord or the other renters for issue continuing?

My wife, my 2 kids and I live in a 2 unit rental house. The utilities are in the landlord’s name and we are up to date on all bills but the other unit is always not paying plus they throw the bill statement away before we can see them. Now, the utilities keep getting shut off. The biggest issue is they have been purposely blocking me in the driveway making me late for work. We have approached the door and told them they need to stop. The landlord has also many times, 3 months ago, man attacked my wife by pushing her down the stairs and then punching her. She also fought back in self-defense. We didn't contact police. We contacted the landlord and she told them they had to go in 30 days. His mother who also lives there and I believe is the main one on the lease has been crying that she has nowhere to go and has no money so the landlord keeps letting them stay with utilities being unpaid and harassment continuing. This is the landlord’s reason for them still living there and now they have been blocking the driveway again kicking my kid’s bedroom wall in late night early morning. My son is 2 years old and has a C.P. My daughter is 1 year old. They have to sleep with us in our room because of this. We also have a bad roach problem due to them upstairs and landlord never follows thru with the treatments from the exterminators of 3 treatments in a year (only 2 treatments over 4 years). Due to my son’s conditions, I am the only one who works because my wife has to take care of him full time leaving us very little money to just get up and move. All of the problems we have with the other renters have been confirmed by the landlord. She just keeps telling us, said they are moving but we have yet to see anything moved. My wife feels unsafe and feed up with all of this.