If 24 hour is not over as of yet, ask your bank to at least hold the payment. Try call locking in customer care at today night. They have a settlement window. If u can raise dispute before that, there is a chance.
24 Hours are long over, also the payment was a State Bank Group transfer.
So it was immediately settled.
I think the person was already added in your payee list. Hence there was no name/account matching was required before the transfer took place...