ST Courier — Misroute of my parcel...and talking rubbishly

I sent a parcel from chennai to acharapakkam...am sending parcels regularly in a daily basis in ur courier service...but this parcel was showing misroute and not delivered yet...it was a big parcel and I called a person named sathya from madurantakam he is the one who's is delivery person that was showed in tracked I'd...once I called he talked worst and shouting a lot and said that dont call me ...then how to contact...he is talking harsh and rubbish...surely I ll file a case on st courier if your not taking action and my parcel should be delivered and he should apologize...