MTS / Sistema Shyam TeleServices [SSTL] — Bill amount for deactivated lines

Address:	Chennai, Tamil Nadu, 600048
Website:	www.Mtsindia.in

Hi, i have stopped using mts since december'16 and called the customer care to deactivate the same however i didn't received any confirmation on that, however mts asked me to pay the bill for which i m not used for the month of january'17 month. Due to continues irritation and non stop long disturbance during my working hours i have paid the amount of 1149 on feb 28 and again called the customer care and again requested the same. However still i m getting message to pay my bill of 2588 which is totally ridiculous and getting threating message like to appear on civil court. Now i got lok adalat notice for the same. I don't know what kind of service mts providing. Please help me on that