HDFC Bank — Reverse amount not reflected in my account

I have cancelled a order on amazon, i immediately got a msg from hdfc that

Ur transaction on hdfc bank debit/atm card ending 4734 for rs. 749.00 has been credited/reversed by amazon on [protected]:03:15:00:17

I checked the online statement and it is not credited into my account. I need help. Since it is a confirmation message from bank, i am assuming that the amazon has done it's part. Will it ever get reflected in my account?