Airtel — airtel activating and charging for unwanted services

My mother (Phone number [protected]) is being charged rs 30 every week for some services that she never subscribed to. Specifically videopindw. I am not sure how many times she was charged but at least rs 60 or 90 has been charged (Rs 30 each week).

The final one was charged on:
Sunday dec 3rd 8:01 am
But it was also charged for the two sundays before that.

Please reverse these activation charges and also stop activating any add-on service without the customers confirmation!