Airtel — reduction in balance

I got a message on 18th may at 4.03 pm from at-airinf:

Thanks for choosing mobistore on your airtel mobile. You have been charged rs.60.0 for 6 days. A/c balance:rs.3.16 at 16:02 to deactivate, call or sms stop to 155223

I did not activate any kind of service nor i did subscribe to any service. I saw this message on 22 may 2018, i called customer care and reported this issue, the executives were becoming real comedians they told me these bull # stories (Exactly in this order)
1. That i had sent sms confirmation accepting this service that is why they charged me. I checked send messages but there was no such confirmations.
2. Then changed the story the sms confirmation became pop pup message which i confirmed and resulted in a charge.
3. When i asked for cancellation of this service and refund, there was a whole new story they were making up that " it is no service charged by airtel, it is a third party service and there is no refund option. But this time i got really confused that ' how can these people charge for a service that they do not provide'?
4. When the call was transferred to a senior there was again a new story: she told me this -" if you had reported it within 24 hours we would have refunded the amount'.
Seriously? If it was third party service then what is that damn deal about "24 hours"?
These guys reminded me of that movie called ' wolf of the wall street'
5. I have a suggestion ; just look in to your phone, how many pop up messages will be there in period of 10 days can recall?
Can you even remember the name of the services they offer?

When we customers use a bit of common sense it can clearly seen that the things they were doing is a complete fraud.

Kindly look in to this matter and do the need full.