State Bank Of India [SBI] — State of india - refund not processed

Address: Shimla, Himachal Pradesh, 171001

Website: SBI

I had ordered monte carlo maroon v neck sweater alongwith another item total amount being rs. 2715 on 3rd february 2017 from snapdeal. I returned the sweater which was of amount rs. 1450 afterwards and was expecting my refund. They had initiated the refund on 24 february 2017. But despite that refund did not reflect in my account. They gave me transaction nos., reference no but whenever i am going to sbi bank they are denying to check the reference no.
The latest transaction number or refund reference no. Given to me by snapdeal is[protected] which was issued on 6th april 2017. Kindly help me getting my refund at the earliest as its already been 3 mnths since i havent received my refund amount of rs. 1450.
Account number: [protected]
name: sharda rani
mob no: [protected]