Refund of unclaimed tds of ay 2013-14

Tds of assesse (e.g. Rs. 100) has been deducted twice (Rs. 100*2=200) for same transaction by one company in AY 2013-14. But assesse has claimed taken credit only once (Rs. 100) in that AY. Balance tds not claimed till date. Now my query is how can it be claimed ? Can we ask refund by filing current years ITR or we need to request for rectification for AY 2013-14. Is there any other way? Plz note that income for the same transaction is already shown in AY 2013-14 .