Debit note for Exsice

Dear Sir,

We have purchase raw material from A company for Rs. 100000/- but it  is found that he has charged excess rate for  Rs.5000 in bill,  in this regards can we reversed excsie duty or not through debit note.

if  we have reversed excise duty , Can" A company " will get cenvat credit of aforesaid exicse duty ?

Waiting for reply,

Regards

Kiran Satdive