United Bank Of India [UBI] — Refund isn't credited to my account

Address:

badhoti ,sawai madhopur ,rajasthan

I buyed a laptop on 13 jan but then retrun it it on 30 jan. and amazon initiated a refund on 31 jan but still there is no amout credit in my account. they told that it should be reflect in your account by 5 feb but still no credit in my account. they also provide me reference no which they get only when the amout is successfully initiated from their end. so but now bank doesn't seem to work properly beacause it should reflect by 5 feb. i want to fill a charge dispute form and please resolve this issue as soon as possible. please return refund asap.