Airtel — outstanding balance

Address:

Bangalore, Karnataka, 560085

Hello,
I previously used to own an airtel sim with the number [protected] registered in the name of lanasol energy solutions.
After i quit the company i put in a request to cancel the number for which i got a letter from airtel which stated that all the outstanding balance has been cleared for the above number and a refund cheque was also given to me in the name of my father a n pradeep kumar.
After all this hastle i still keep getting calls from airtel saying that the balance amount has to be cleared and i am getting calls from my old company also telling me to clear the balance.
I also put in a request to cancel the number again after visiting an airtel outlet and was ensured that i will never be bothered regarding the same issue.
I kindly request you to sort out the matter and stop troubling me and my company regarding this matter else i would be forced to take other measures.
Hoping that the necessary will be done.
Thanks,
Avinash.
Cc : letter sent by airtel has been attached.