Railyatri — for refund of 160rs. which courier boy charged extra which don't have any mean

Dear sir,
I order food for my sister against order I'd 1522363 and paid online. But courier boy charge 160 RS. By making her fool. I told her this is you COD order so you must have to pay 160Rs. She got confused and paid him which don't have any mean.
Sir please refund my amount and take strict action against him.
Thanking you
Vishal