Airtel Mobile Prepaid Service — did not want 3G activation but done unwanted

Address: Chennai, Tamil Nadu

I have my small basic mobile (not smart or android) chennai based number [protected] . I was havving my 2G connection and today in Bangalore in a roadside shop recharged it further for Rs 201/- expecting the balance to go to Rs 300 + . But to my horror it shows a very small balance talk time Rs. 82.99. PF RS177.88 ( I do not know what PF is ) Talk time Rs 1.00. What is all this ? another message says that 3G is activared. Who wanted 3G? I never wanted 3G. I want to remain in 2G only. I thought the balance would be above 300= If this is the way airtel loots poor customers like me, I better not have a mobile and shall be happy with a BSNL landline only. Make it urgent and restore my money of Rs 300+ from airtel K.S.Srinivasan