Airtel — gamepind service activated unknowingly

Address:

East Godavari, Andhra Pradesh, 533440

Airtel gave me shock. I was wondering how the gamepind service got activated without my permission. I am the only who uses my mobile and i tried to contact customer care, but no use. No one is helping me how to resolve this issue. Service has been activated twice today and i got deducted from my prepaid account of 60 rupees. Kindly resolve and credit the amount to my account immediately. How can airtel do like this? Please give back my money.