Irctc — not getting sms for automatic cancelation waiting 3 e ticket after charting done

PNR:[protected], TRAIN:15036, DOJ:18-05-15, CC, KGM-DLI, Dep:08:50, TARA DATT, WL 16, I have booked my ticket for KATHGODAM to Delhi at waiting 16 evening 18:00 hrs I have checked pnr this time updated pnr waiting is 3 and charting done so I have not got the sms of automatic cancelation. When I filing TDR the reply is your waiting list ticket is automatic canceled so TDR filing is not required please look into the matter thanks.