Airtel — Validity of recharge giving only 3 days instant of 30 days which was in offer please help Airtel customer ( mobile number - [protected] )

Address:	Kolkata, West Bengal
Website:	www.airtel.in

Sir, I Ava Rani Saha my mobile number - [protected] . I got a offer after dialing *121*1# that after recherging Rs 17 Local Airtel to Airtel mobile call charge will be 25 paise / minute and other local and STD mobile call charge will be 30 paise / minute validity 30 days instant validity 3 days and extra validity withen 1 hours and to get it press 1. According to that I press 1 on 15/09/2015 at 09:41 pm and got a sms that enjoy All Local mobile calls @ 2P/3sec for 3 days at Rs/17 and Rs 17 deducted from my main balance instantely. And after dialing *121*13# and then press local voice calls I got all local calls are 1.2 paise / 2sec and validity is 17/09/2015 . I could not understand how it is possiable ? Why my offer validity is till 17/09/2015 ( only 3 days after 48 hours of recharge) it must be till 14/10/2015. Instantely I called 198 and try to complain about it but customer survice person did't took my complain. It's a cheating and unethical . Please help me . I could not understand what to do now. Thanks Ava Rani Saha Mobile Number - [protected] West Bengal / Kolkata