Himachal Pradesh Gramin Bank — Money refunded by Amazon ( a trusted shopping site) but I have not received it in my account

I have ordered a pair of shoe and I don't like them. Then I returned them and Amazon said your money has been refunded and your bank has generated a reference ID whick have been sent to my gmail . The reference ID was 30005410131007204834709.But I haven't received my money . So I wanted you to help me .