Thereating calls

I was married 16yrs ago,my husband and I,both WERE DOING JOB . After my marrige I started to live at my in-laws house,after sometimes they started to create pressure on me regarding dowry,they wanted money from me to repair their house,to buyAC etc. Their pressure was so extreme that I tried to commit suicide, but was rescued. After that I left my in-laws house and started to live with my mother. My husband used to come to my Mom’s home at night only, and this system continued for 6 years. I had no relation with the other members of my in-laws . But my husband too started asking for money from me and my mother,he often beat me as i denied to give him money. I AM DIVORCED NOW BUT from last 2 YEARS we are THEREATENED BY my EX husband AS WE have no cantact for last 5 YEARS . Now ,today i got a phone call from an unknown person, THAT MY EX HUBBY AND HIS SISTERS WANT to meet ME . I denied to go anywhere to meet an unknown person. Now I want to know what should I do? Should I meet that person or what legal step can I take? my security is also at risk .