How to deal with sexual harassment of the elderly?

I'm also in the headache of this thing, I am often harassed by the fifty or sixty year old woman, I work outside, live in a large yard, the same yard, a 60-year-old woman harassed me, I went out to get water she heard the sound of the voice immediately over, the road to meet me, no one around, then she stood there smiling eyes straight at me, wanting to let me and her eyes, and then rub out a spark or something, I came back from a night shift, the yard, just her and me two people, I always close the door because of fear, she ran to my door near the singing, but also with a pretentious tone of one person talking to me. I came back from the night shift, she and I two people, I always close the door because of fear, she ran to my door near the singing, but also with a tender tone of voice a person there to talk, during the day can go to my door about thirty times, the total **** can be stayed for three or four hours. I can't even sleep. I met more than one old lady harassed me, I look honest, look is honest, look also clean, easier to encounter this kind of thing, take the bus next to the old lady can put her head deliberately leaning on my shoulder pretending to sleep, the road to meet an old lady, my eyes accidentally on her eyes, she smiled to me, walked to me in front of the implied love look at me. I don't know if there are any men who have encountered me like this.