United Bank Of India [UBI] — refund of book

My name is kajal rai. I oredred a book that is secret of nagas of rs 199 on 24 April 2019 .It was pareted soo I replaceed it and replacement was different book soo I returned my book secret of nagas rs. 199 on 5th may.I contact to amazone for my refund.I send my refund on 18th may by ref. no.[protected].My money is not regulated to my account. I contact to amazone the advice me to fill this form.I contact my bank for this bank said amazone don't send any amount .
before this I filed a compalains in bank for this the said amazone don't respond them.so I want to file charge desbute form.
Kajal Rai