Airtel — airtel indifference

I have airtel $g hot spot [protected] for the last two months. I received bill of inr 675 while my plan is 399+tax. There is no one to talk on phone 121 because it is automated. Services have been discontinued much before last day of payment which was 5 jan 2020. Even if i want to pay amount so called overdue website says it has sent otp which is actually sent 1-2 hours afterwards, i have emailed customer services but response is automated.