Tata Teleservices — rental charged even after disconnection of tata docomo data card

Address:	Gautam Buddh Nagar, Uttar Pradesh
Website:	tataindicom.com

I raised a cancelation request on 28th sep 2015 but the disconnection was done only on 4th oct. I was charged full rental until 20th oct. When i am trying to seek clarification on the disconnection date they are giving me different dates on mail, call. They have sent many mails asking to pay the dues but no one is helping me understand how those dues were calculated. I am not surprised they lost market share in data services. Their processes and customer service is pathetic.