Tata Docomo — Huge Balance deduction

Address:

Ahmedabad, Gujarat

It has after to me for more then thrice. Whenever my internet pack is finished n even i forget my mobile data for 30 mins it deducts all balance. i have lost like Rs. 100 balance thrice. N i hav a proof i dint use much of data its sudnt cost me a 100 bucks. Android phone calculates it mobile data... n i had 17 mb left in my internet pack n i downloaded 24 mb. this exceeding 7 mb costs me 100 rupees thats sick. I called customer care for help. and the guy jus ends the call saying our system is down call us later. and next when u call, no representative picks up the call. The same happened last tym too. I hav my proof of wat i downloaded.