Mental harrasement for money lender

I have borrowed money from a friend of amount 60k in Jan 2018 but due to some circumstances could not return on time she was then asking for interest i said fine will pay u that, but when i still could not pay she said she will kidnapped my children from school which made me mad and i said i will not pay u any interest or any money, because the transaction was done in cash so nobody is aware of it and i can deny i will not pay, but i am not like that i have certain situations wherein i am unable to pay you, so she said you have to pay me 78k with interest i said ok, that i started from November 2018 and paid little amount till May 2019, i lost my job, my husband lost his job, so could not pay her, found a job and husband met with and accident so salary went in hospital, n then my dog had kidney stone in the same month her operation so i am totally broke, i dont have money at all, and dont have any support from family, now she is calling me daily and harrassing, come to my place and pay the money, i explained her my situation but still her daughter and she does not understand, both are torturing like hell, i am telling them i dont have, they are like we dont know anything pay us now, its the same thing daily. i and fed up and dont know wat to do, i am getting mentally tortured by both of them daily