Airtel — whatsmob service activated without any intimation

My name is Rajesh. My father, a senior citizen, is using his airtel number [protected] for the last 10-15 years. Please note that unwanted services are activating in this number without proper consent. As an aged person, he is not aware of features of mobile phones except making calls and texting messages. Last week, an amount of Rs. 150/- was deducted from his balance by showing a message "WHATSMOB service has been activated @ Rs 150 for 30 days. Txn ID N[protected], 16 May 2018.Service will be renewed after validity expiry". Please note that he is using a Nokia mobile with keypad as he is not familiar with Android phone and has not activated any such services. As per TRAI regulations, unwanted services should not be activated in mobiles without consent of the Customer. When I called the customer care on 19/05/2018, they told they can deactivate the service, but can't refund the money back. I told them that I am going to make a complaint, then they told that they are calling from the top and I cant complaint anywhere. This kind of looting is not good for such a reputed company, Anyway, we are going to port the number to BSNL and will be informed with my friends too about this shameful incident.
Rajesh - [protected]@gmail.com

I am an airtel customer for last 18 years.
Since last 4 months, my bill showing Rs 3K each month, extra, for SMS from foreign nos at rs 5 each sms, without we explicitly starting any service . My phone also do not seem to receive these sms, while bill shows. In total I have already paid 5k for these sms. I have a Rs 999 plan.
Before this my 86yr old mothers phone, many unwanted service got enabled, and I had to visit store to disable in the middle of pandemic.
This is robbery in broad daylight.