Airtel — airtel - gamesworld pocket

Address:

Vadodara, Gujarat, 390019

This morning ( 21.10.2018 & 06.11.2018) l (Cell ph no [protected]) received the following sms from my service provider airtel, stating -
"thanks for using gamesworldpocket. You have been charged rs 20.0 from your airtel mobile account. For more services, call 56789"
I never did use the stated item, nor did l ever opt or ask for it. Forcing such payments on to customers by the mobile phone service provider amounts to cheating and unfair trade practice.
I want immediate refund of the deducted amount and non-recurrance of such incident.
Kindly look into the matter urgently.