Postpaid bill amount beyond the actual bill

Postpaid bill amount beyond the actual bill
Dear team,
My Name is Nikhil Khambhati.
Contact no:- 8431297929
In reference to above subject last 2 months my bills are generated beyond the purchase plan. Last time Vodafone activeted prime without asking or confirmation of customer. Thjs time same issue. Some activity activeted by vodafone and customer have to pay this amount.