HDFC Bank — Reversed transaction not credited to my account

I paid eb bill through amazon. But my transaction got reversed immediately and i got a msg from hdfc bank that amount in credited to my account. I checked my online statement and it's not reflected in my account. When will it be recredited to my amount? Will it ever get reflected in my account?

Ur transaction on hdfc bank debit/atm card ending 6835 for rs. 770.00 has been credited/reversed by amazon on[protected]:20:50:18