Abn Amro — Credit Card recovery

Address:

New Delhi, Delhi, 110001

I had ab ABN AMRO credit card.
In 2006, i made the final settlement. i am in possession of the settlement letter and the receipts.
Still every 2 year some recovery guy or the other will call up pretending to be a police wala, a judge, a lawyer.
today i got a call from [protected] and [protected].
They used abusive languages.
I inquired the Kotak Bank which i am told now owns ABN, but no one was in a position to give me any details.