MTS / Sistema Shyam TeleServices [SSTL] — Mts data card complaint

Address:	605013
Website:	www.mtsindia.in

I have purchase the data card and used for several months and then i stop the data card (internet service) due to poor service. and then i have paid the bill and get the acknowledgement letter from the ambattur (chennai) station. but they made a criminal idea that stop the internet service and didn't deactivate my account so they make a bill of 674 rs and giving torture to pay. since iam from poor family i have to make statement for every money what i spend. since i have the letter they are not believing me. i don't leave my rights. people don't purchase any product from mts is a cheating company. i need clarification for that no one giving proper response.