State Bank Of India [SBI] — didn't refund money in my account by sending amazon

Address:

vill chatkar p.o jassal teh. karsog distt. mandi (h.p), Mandi, Himachal Pradesh, 175009

I am buying a watch from Amazon but some issues it will back to them . I give them 299 rupees online from my SBI card .after got there watch back Amazon send me money and they send me a reference no. 235827 To showing that they had been pay money in 18 February. But in my account it will not transferred. Amazon said they had refund money its your bank problem who didn't refund this amount.