Vodafone — Activated MyDala without our knowledge and charged 49. for it

My Father-in -law aged 71, has vodafone no. and a simple keypad mobile. He usually don't handle mobile rather than calling.but on 6th of april, 2021, he got a message that he has been charged Rs.49 for MyDala service . He has suffered many times like this with different service activation. Also my Mother-in-law was charged some rupees for chota credit plus service.This is totally unfair to deduct the money from these kind of people, as they didn't know why it has been deducted.