Cenvat credit on service tax

Yes, but after payment of service tax to the department and payment to the vendor of the invoice value

Pls check it out whether you paid service tax on inward freight or outward freight.  If it is for inward freight of raw material, then you can avail cenvat credit.  If it is for outward freight i.e., freight on your finished goods, you cannot avail cenvat credit.

Only after payment of service tax u can take credit but only on freight inward .
 

You cannot avail service tax input credit as you are already claiming the benefit of abatement