Bullying neighbour

We are living in a rented accommodation legally. Our entrance is from side lane according to the agreement as we are living on first floor. Ground floor has also been occupied by tenants and they are using front gate. Our neighbour is an old couple who do not have any kids. The lady from the house bully us that she will not allow our car and scooty to park in the side lane. She has also obtained an order of no parking in the lane for security reasons of the old couple. Moreover she has put up an iron chain and closed that side lane by it. Now she is creating chaos daily and do not allow our car to move out of the lane. She even mishandled our scooty single handedly and threatening us that do whatever you want to do. She uses abusive language daily and says you do not have any right as you are tenants. She is disgracing our personality by using ugly language. It's a daily routine now. We have even talked to her but of no use. She is taking advantage of being old. What should we do? Please guide.