Airtel — value added service whatsmob

Address:

Thiruvananthapuram, Kerala, 695011

With out my convent airtel has deducted rs.150 from my prepaid account from my cell no.[protected] in the name of providing me a value added service called whatsmob. This amount was taken from my account at 3.55 am while i was sleeping.
I am providing you the sms as proof :-

Whatsmob service has been activated @ rs150.0 for 30day (S). Txn id n[protected], 18may18 03:55. Service will be renewed after validity expiry. To use, click http://202.174.122.12:8085/airtelwap/actnotify. Php (Data charges apply). To deactivate, call or sms stop to 155223. More services? Call 56789

Later on when i woke up seeing the sms i deactivated the service using mobile app.
This amount should be credited back to my account.
Regards
Jeevadarsan
[protected]@gmail.com
[protected]