State Bank Of India [SBI] — refund amount from amazon not initited to my account.

I was purchased urban infotech 3.5 mm clip-on mini lavalier microphone at rs.399.00 from amazon on date 03.06.2020, but after my returned the item to amazon they refurned my balance in to my sbi bank account on 09.06.2020 having the referrence number[protected] but still the amount is not credited into my account no [protected]. After asking amazon they confirmed by e mail that my ammount is alredy sent by him and they told to ask the bank customer care, after i contacting with the bank officials they refused to do so, and told me that there is no refurned from the amazon.
Kindly help me to get my money.