Indian Railways — About ticket counter master

In MGR CHENNAI CENTRAL RAILWAY STATION the reservation counter master is not issuing reservation tickets from anther station ex like from coimbator to vijayawada. He only giving starting from mgr chennai central station I asked him why are you not giving he said come at different time when that time the train is been started already and also hes has hesitating the north indian people. General he is on mrg shift old person plz solve this problem fast because so many people have face really hard time they are staying in station 2 to 3 days by this person is not giving tickets and trains are been gone. Thank you