IRCTC/online Ticket Booking — same berth allotment to two different passengers.

Address:

Panipat, Haryana, 132103

When i was booked my ticket on that time pnr status is w/l 28 but today its confirmed to rac/s4/55.
When i reached to my berth then it a other person already slept at my berth whose pnr no. Is [protected]. When i asked him for my seat then he showed his pnr status. Status of both pnr no.'s was same. And my pnr no. Is [protected]. I want my money back because i am sitting at other person instead i had my own reservation. Please refund my money as soon as possible.