Refund of TDS Deduction with wrong details

ALAK MAZUMDER (SENIOR MANAGER( PETROCHEMICALS-MKTG.))   (57 Points)

16 May 2011  

A contractor was given TDS certificates with wrong details ( Name and PAN No.) for FY 09-10 and 10-11and TDS deposited again with wrong details ( Name and PAN No.). How can the contractor  (assessee) get the refund from I.T.department?