Vodafone India — theft of money from my mobile number and misbehaving from their customer care

I have recharged with 396 and make call any number free and 1 gb data every day for 70 days. But they regularly cut my mobile balance and tell me that it's for data usage over 1gb though i didn't use data more than 700mb in that particular day. And its become a regular incident and they didn't give any last deduction status also. And when i am calling their complaints help line number they misbehaving with me. Please help me otherwise they make my life a worst by looting money every day. If there is any possibility of getting ₹396 return i will immediately port my number then.