Mmts — Missed train because of mmts

Address:

House 3,durga province, ameenpur, Near Narendra nagar colony, Near Narendra nagar colony

Sir,
My father was traveling from kacheguda to ananthapur on 7th September by yeswantpur exp.time of departure is 9:05pm.so my father and mother both were started from chandanagar mmts to kacheguda at 6:39pm.i thought there was plenty of time so that my parents can reach early and catch the train.pnr number is[protected].their badluck is mmts train reached to kacheguda at 9:30pm.how can a mmts train takes 3hours from chanda nagar to kacheguda.its really pathetic.my parents missed the train and suffered alot.i never ever trust mmts now onwards.plz look in to it and follow timings.