Amazon — i'm complaining about my amount that has to refund me from amazon

I booked an product in amazon as it was cancelled by them but my money was debited from my account and the same day they intiated my amount and they said that the amount will be credited to your account on[protected] but still amount was not credited to my account and they asked to check in the bank i have contacted the bank to and they given my branch number and the branch person is neglecting the issue they are not even caring help me as soon as possible its an serious issue please provide me information about my amount