MTS / Sistema Shyam TeleServices [SSTL] — Irrelevant bills and wrong commitments

Address:	New Delhi, Delhi
Website:	mtsindia.com

I bought an MTS device in delhi at a rate of 2500. MTS says that the devices cost is 2500 but when I was buying the connection I had this impression that they have taken one month advance as a security rest of the amount is for devices.This is a year old connection and I brought it from MTS for official purpose.Now whenever I have asked them to close the connection they have some how denied to do so.Since the day I have started using JIO I am not using MTS.

All the amount of 1770 I can clear I am asking for the bill against 1770 and the usage details along with the statement that what for they have taken 2500 from me?