Kotak Mahindra Bank — mental harassment for credit card payment

Address:

411021

After communication and call with the collection agent. Amit patankar and intimating them about the due date.
Still the person showed up at home and office.
And constantly kept calling for over a week inspite of intimation.

Very rude and harsh language was used also he abused.
There are legal means to do this and not by harrasment or deliberately intruding in my provate space. Home or office.