Kotak Mahindra Bank — Credit Card Due Date Reminder Call Harassment by calling 20 times a day

I get 30 to 40 calls everyday from Kotak Mahindra Bank Credit Card Department. Operator calls just to remind my credit card due date. So far I've blocked around 150-200 numbers of them even thou they manage to call me from new number. Apart from 15 - 20 calls from new number, there is around 50 miss call from block listed number so in total If we calculate approx. 90 calls a day just for a reminder. Are you guys insane ???? I have always pay my dues on time. I've informed there representative also but they say pay now so that we can stop calling you. This month due date is on 3rd May & I am paying this on time on 3rd. but from next month if I get any reminder call as per RBI Guidelines & FDCPA, I will file a FIR against Kotak Mahindra Bank for harassing me.