Service tax return rectification

we  are a pvt ltd company and service receivers,we  pay service tax on account of goods received by road transport under reverse charge

now, do to a oversight,a transporter charged us a freight ammount twice on 1 bill,since we were not able to check,we paid service tax two times on the same invoice(in the month of april 2014)

now i want to know can the return be rectified?if not then what to do for the excess payment?