Consumer Redressal

i am a TATA DOCOMO user, today my whole balance approx Rs.79 was deducted saying data usage,but then i checked still internet data was their,and this is not the first time my balance is deducted 4 days back they deducted Rs.50 also.i am really gone mad on it.and then i called 198 their also it said some non sense.but did\'t returned my balance. i want my money back,also dis should not b repeated by them again.