Airtel — Disturbing again and again

Hello, I took an airtel internet connection in May 2021 and they gave me 2 extra sims along with my old number and a WiFi machine.
I even closed my postpaid service on the main line number [protected] by paying approximate Rs2500 but you people keep asking and calling me pay the bills.
The numbers were
[protected]: Main Number
[protected] : 1st sim
[protected] : 2nd sim
I have already paid my bills and even asked them to close my postpaid service. Whatsoever you did I don’t know.
So Kindly release my name from your dues and stop calling me.
Because there is no way I am going to pay anything else. Its been months since I am not using these numbers.
So I am not going to pay for something I haven’t used.
So it’s high time, I have been witnessing these harassment calls since months.
This is just a shame
Contact number: [protected]