Indian Railway Catering & Tourism Corporation [IRCTC] — Less refund amount

Address:

Bhadrak, Odisha, 756131

I had booked a ticket bearing PNR NO [protected] in train no 12822 / DHAULI EXP in chair car. My ticket could not be confirmed and remained in Fully Waited List even after preparation of chart. The cost of booking was Rs. 371/-, however I got Rs. 260/- as refund amount. Please explain the details as the cancellation charges is not applicable in this case and only clerkage amount is supposed to be deducted.