Airtel — balance is there still asking for recharge

I am a very old customer I use my number for calling sometime only I always have balance in my num n mostly I got calls from everyone I don't need to call them still ur company worst plans if a person don't want to recharge u guys forcing them to recharge if they have minimum 5rs bal also for the cause of validity y who are u guys to tell we should recharge our num or not everymonth because o[censored]r ### validity make me to charge n most imp I found airtel network is not so good u guys only advertise for network but not take any action.