State Bank Of India [SBI] — regarding deduction of money

I used my sbi debit card on 6th march 2018 for a payment of my cbse pmt (Neet) form. The amount of rs.1400 was deducted but was not paid against my form, it showed a failed transaction. For that i contacted bank many times but they are not giving any reliable response, they are saying that the amount has been returned on 8th march 2018 but it has not been. For the same i updated my passbook but didn't find any debited amount as such. I am mentally harashed now, plz help me for the same.
My a/c no. [protected]
Mb no - [protected]
Ref no[protected]
Ifsc code - sbin0017477