Dial the Kotak Mahindra Bank credit card customer care number, 1860 266 2666 You can register your complaint either through the bank’s internet banking portal or by using the web portal Contact Kotak Mahindra Bank directly at +1 (860) 266-2666 or [email protected]. Get customer support, file a complaint, and resolve your issue fast. 1860 266 2666 is the primary Kotak Mahindra Bank customer care Number. This is a toll-free number available 24"7. In addition to contacting the customer care team via the toll-free number, another method to cancel a Kotak Mahindra Bank credit card is to submit a written request through a letter.