Income tax refund

Dear Professional Colleagues

I want to know that if any belated ITR filed with the department claiming income tax refund and later on after getting refund claimed in the return, it was found that TDS claimed in the ITR filed less than actual amount, then what to do to get balance income tax refund which was not claimed in the return of income.

This case is of the A.Y. 2009-10 and ITR filed on 30.03.2010.   

Thanks for Co-operation.