my e-ticket with PNR no4417210335 and transaction id 0207345939.
The ticket status was Wait listed till the time of chart preparation.
Therefore the ticket stands canceled automatically and am eligible
for full refund of the fare. however the refund was made (receipt no
12298355147) after deducting cancellation charges. IRCTC rejected my request for full refund of fare informing the deduction was made as per railway rules.However even after forwarding the relevant railway rules allowing full refund ,whose extract is reproduced below, IRCTC did not respond positively.
Railway rules 7 & and 12 dealing with refund for unused waitlisted tickets which are :

12.Cancellation of tickets where railway administration is unable to provide accommodation. –

Where a railway administration is unable to provide accommodation for any reason whatsoever to passengers holding reserved tickets, no cancellation charge shall be levied and full refund of fare shall be granted to them if such tickets are surrendered for refund within three hours from the actual departure of the train:

7.Unused waitlisted or RAC tickets. –

(1) Subject to provisions of sub-rule (2), no cancellation charge shall be payable if a wait-listed or RAC ticket is presented for cancellation –

(i) upto three hours, when the ticket is for a destination station upto Two hundred Kilometres,

(ii) upto six hours, when the ticket is for a destination station of more than Two hundred Kilometres but upto Five hundred Kilometres, and

(iii) upto twelve hours, when the ticket is for a destination station of more than Five hundred Kilometres,after the actual departure of the train except for the deduction of the clerkage :

Provided that for night trains leaving between 21.00 hours and 06.00 hours (actual departure), refund shall be admissible at the station within the time limits specified above or within first four hours after the opening of reservation office, whichever is later.
IRCTC is totally unresponsive to my subsequent e-mails on the above subject