Airtel — unfair deductions

Address:

B/10 Salas society Rambaug lane no 4, Opp to Kalyan Janta sahakari bank Kalyan (w), Thane, Maharashtra, 421301

I had a balance in my account for the airtel prepaid number - [protected] but it was deducted by the company and when asked the reply from the company is i did not use the amount within the validity i. E 28days
Whereas while recharging there is nowhere mentioned in the airtel plans that if i do not use the remaining balance within 28days the balance will be deducted/lapsed from my account and the money will be eaten up by airtel company.
Hence airtel is committing a fraud by misguiding all the customers by providing incomplete information and hiding this # information
I have attached a screenshot of the plans where i cannot see written as i have to utilize the balance within 28days, in fact, it should be carry forwarded to my account till it is utilized.
Hence it is a clear case of fraud and cheating hence i would like to charge airtel for descrepency in services, adopting deceptive practices