Adjustment of excess vat to cst

Sub: adjustment of excess vat for cstGood morning ...For the month of feb 15Excess vat: 79000Cst payable : 53000While filing the vat return,I had adjusted the 79000 instead of 59000 for cst.... In vat returnNow it is showing "0" for net excess carried forward AFTER filing REVISED VAT RETURN also....Now what should i do regarding this... Please guide me ... As the due date of filing vat return is 20 feb.Thanking you in advance.