University Of Madras — my amount debited but not confirmed

I am bcom general corres student. I paid second year fees 4520 through online money debited in my card but not confirmed by university and another time i reached same website it is not processed and asking me another time to pay same amount, so pls report me or refund my money back or confirm my payment as soon as possible. Kindly take action about this sir and clarify me soon sir sir... My enrollment no — a18101ucm6497