MTS / Sistema Shyam TeleServices [SSTL] — Mts Mblaze wrong Bill payment

Address:

Coimbatore, Tamil Nadu, 641402

I have purchased dongle from MTS Store. I had used last one year.One of the issue My Name (Initial) is wrongly entered and there are sent every month bill ..and many time complaint to customer care at the time i had paid every month correctly.there is no response..finally i complained zonal office.There take action for name correction.But after make the name correction.they are sent two bills for same month. at the same the dongle also more than 15 days not working. i had complaint many time to customer care and sent mail to nodal officer, customer care team.same problem..they are not given any response.again they will sent the bill for non used dongle. many threat calls from legal department for non paid payment to me. but why i will pay for unnecessary bill. very very bad service MTS. they will ask payment useless service.