The customer care number for HDFC Bank is 1800-270-3333. This is a toll-free number that you can call from any phone, including landlines and mobile phones.
You can also contact HDFC Bank’s customer care by sending an email to customercare@hdfcbank.com or by using the bank’s online chat service.
If you prefer to speak to a customer care representative in person, you can visit your nearest HDFC Bank branch and ask for assistance.