Airtel — Unfair and Excess Billing by Airtel: Broadband Account

The issue pertains to excessive and unfair billing by Airtel Broadband. I have subscribed to 40MBPS plan of Airtel which was priced at Rs.699. Recently there has been a price cut for 40mbps plan and the price got reduced to Rs.499/month. Thus monthly Rs.499 plan has replaced the monthly Rs.699 Plan on the Airtel Website. But when it comes to Billing (for Sept2020) they are still charging the higher price of Rs.699+Taxes, which in my view is unfair. Airtel executives argue that they are not going to give the benefit of pricecut unless a customer finds it himself on the website and asks for this benefit!. In my view since plan price has been reduced and older higher price plan being replaced with new plan (without reducing the Connection Speed), existing customers under this plan should automatically be provided this benefit. Instead Airtel is cheating the customer by
1. Not informing the customers price cut (atleast by group Email/SMS)
2. Continuing to charge older, higher price
3. Refusing to charge pro-rata after taking price cut into account.