Anna University — refund amount on review revaluation has not yet received

I'm sugirtha, a passed out student[protected] batch. I got one paper arrear on my 7th semester. Later got cleared by applying review revaluation (by paying 3000rs which is a refundable amount). It's been 5 months. I even got the degree certificates and transfer certificate. but didn't receive the refund amount of 7th semester yet! Kindly do the needful.