Allahabad Bank — refund issued but not received in my bank account

Address: Dhanbad

Amazon online shopping app issued my refund but i did not received my money in my bank account and i tried alot of time to contact my bank but they are refusing to talk to me. My refund reference is this which is issued by amazon online shopping app id-[protected]. Its 436 rs needs to be refunded. I paid rs 2 from amazon pay balance and rest of rs 671 from upi payment from that i got refund of only rs 235 in bank account and rs 2 in amazon pay balance and rest of rs 436 is not received yet. Please help me..