TDS Demand

Hi, I have filed TDS return for Q2 for 2013-14. I have entered date of Q1 as date of deduction in one entgry of that return. I have filed revised return but it is not accepted as the entry contains C (higher deduction.)and correction in date of deduction is not allowed where there is C entry. Now my client (bank ) received notice for that quarter's demand. Plz suggest me some way to file revised return and get accepted that return.