Bajaj Finance — Harassment after death of the loan taker in spite of closure of the loan

Loan No. 405DPF84547470

This loan was taken by Mr. Milind Desai and post his death was settled by the family, we have everything covered on the email but inspite of the closure every 3 months there are multiple calls on the family members cellphones trying to harass, its highly disturbing to hear things about a ceased member and this is all due to their lack of data updation.

Wish to sue this company for harassment.
They infact owe us an amount that was to be obtained as per the insurance cover.

But all we asked was to leave us without the harassment.
Pls help to sue this company who has no ethic whatsoever and is just formed to harass people.