Tds deducted from salary by company

Sir,

 One  of  my  client  working at   Public Ltd Co. in this  regard   Company  deducted  from his Salary  TDs  for  the  month of   March 2008  for Rs. 3500/- I filed  the return  in  ITO ( Pune)  on the  basis  of  Company  provided   form  16   in that   challan  deducted    amount  of Rs. 3500/-    &  I  demanded  the  refund  they  drawn the  refund  cheque  but not issued   to my client   because of   26 a  not  seen  the  that  challan     &  Clients  company  not  given  the  Hard  copy of  Challan  please  suggest me .

Thanks &  regards

Jagadish Dulare