You can also call 1800 202 6161 / 1860 267 6161. If you have noticed any unauthorised transactions on HDFC credit card, you can report it right away by calling on the toll-free number given below: You can also call 1800 202 6161 / 1860 267 6161 . HDFC Toll-free Credit Card Customer Care Number Chennai Get Through the toll-free customer care number, you can report any credit card related issue, without validating your details. This is much helpful when you don't have you HDFC credit card handy. The HDFC Bank Credit Card Customer Care Toll-Free Number is 1860 267 6161 / 1800 202 6161. It is available 24x7 for all credit card-related queries and support. HDFC Bank Customer Care: Get 24/7 support by calling our toll-free number for all your banking inquiries and assistance.