Idea Cellular — Asking to pay money for unused and inactive sim

Good Morning Sir/Madam,
On behalf of Vodafone idea,
Your Vodafone idea payment is not received yet.
If you wish to settle your Vodafone idea Account, We offer a settlement maximum waiver 40 %
on your Total Outstanding there is a maximum waiver due to the COVID-19 scenario.
We request you to make the payment for the balance over-due amount at the earliest to avoid further action in LOK ADALAT

Click to pay now:- https://www.billdesk.com/pgidsk/pgmerc/vil/VIL_details.jsp.
Ignore if already paid. OR u can call on
Valid till today 20 /08/2021

I am being asked to pay settlement fees of rupees 533 for a sim that has been inactive for more than a year.
When asked to give me a detailed bill about the services used they say we don't have any records.
Additionally, I am repeatedly being messaged and harrassed from different numbers to pay the amount for a service I have not used.
As a customer I should be given a detailed bill and the log of calls if made to justify the charged amount. Deliberately not giving information and coercing someone to pay unjustified settlement fees which also includes a waiver is ridiculous. I have never seen any establishment waiver amount on "bills".
The sim has been inactive for more than a year, isn't it company's responsibility to intimate the customer as soon as the sim goes inactive. But this establishment prefers waiting for a year before asking "settlement fees".
As a customer, withholding information about services used and coercion to pay for services not used compromises my rights as specified by the consumer protection act, 2019.