GETTING ABUSIVE PHONE CALLS

I am getting constant phone calls on my mobile and residence number where my elderly parent is being abused. The callers are stating themselves to be from Phoenix Enterprise on behalf of Kotak Mahindra Bank. They are using abusive languages and not listening to whatever being told. They are asking me to make some immediate payment and when I am asking them to communicate with me through written letter so that their identity is established, they are using abusive languages. The calls are being made from 02262357796/7977003266