Indian Railways — improper/wrong information of seat on online ticket booking via irctc app

Address:

Amritsar, Punjab, 143001

PNR no.is [protected]
Date of travel[protected]
Train no.12241
Boarding station-ludhiana
Destination-Amritsar
Coach and seat no.D1-103 (WS) showing on ticket printed
But when arrived on train D1-103 was Middle seat.
Wrong information was provided on Online ticket booking.
Kindly go through properly to look at this matter. it's not happening first time but complaining first time..