Tpsl Education — Money has been debited and it's shows successful but in bharathiyar university page it's shows failure notification

I am Neethu, I have paid for the b. Com 1 st year exam registration fee rs 1600 it has been debited in my account and shows successful in gpay but in bharathiyar university site it shows failure notification,
Kindly refund the amount at the earliest
Suggest me the ways to resolve it.
Pls do needful