Airtel — bill received number inactive and unused

Address:

700009

Hi team,
I was provided a sim card for a 4g wify device. Sim number[protected] and mobile number [protected] data plan for which i never received the device on time and neither did i used it. I instructed the sales person that i don't need it anymore. But i am receiving bill for it. Please stop the billing immediately and also note that the bill generated will not be paid.
My mail id is prithwiraj. [protected]@gmail.com on which the bill is coming.