[Resolved]  United Bank Of India [UBI] — Refund isn't credited in my account

Address:

Chapra, Bihar

I'm Indrajeet Kumar
My account in United Bank Of India
Account number[protected]
Account holder name-Indrajeet Kumar
Branch name - CHAPRA (BIHAR) (1881)
Pin code - 841301

Amazon send 403 rupees in my bank account on 13 January 2021 ( OR AFTER 13 JANUARY), but amount is not showing in my account.
Amazon told me, they send money to my account and they also provide me a Reference Number[protected].
I also contact to bank and bank costumer service but they don't solve this problem.
I also mail two times to bank costumer service, but they don't respond.
Please look into this matter