Check hdfc Customer Care for all types of inquiries. Check 24x7 (all days) helpline number for Debit card, credit card, Loans and other financial queries of hdfc Bank. Helpline Numbers Our Toll Free Helpline Number : 1800 210 0018 (Accessible across India) You can also call us on CITY Toll Free No: 1800-258-6161. Email: [email protected]. Contact us at HDFC Bank's customer support, we are committed to helping you meet all your banking needs with our customer care service available 24 hrs a day.