HDFC Bank — not getting otp in emails to start net banking

Hi team,
I am sheela tiwari and i am account holder in hdfc bank. I forgot my password of net banking so i tried to reset it. There is two ways of resetting my password.
1) through phone number and debut card however it's not possible in my case as i don't have debit card
2) through email and phone number however i am not getting any otp mail.

Please help