St Courier — Delivery not in time

My very important and urgent document is been registered in ST courier Consinment no: [protected] and got the receipt yesterday 2.09.2021(18.00hrs). today i called to [protected] to track my document. they say is been wrongly sent to chennai and will reach chengalpet tomorrow only. What is the need of sending through courier, it is very urgent document i need to submit in time. If you are not ready to deliver in time, what is the need of courier service. If i ask the madam to register complaint, they are not registering. If iam not submitting my document tomorrow morning, i will be penalized, will the courier office take responsibility for that. Will the courier office pay me the late fees which iam supposed to pay if iam not submitting in time.