Airtel — Sim card not activated after one week of buying.

Address:

Demow, Sivasagar, Assam

I bought a new Airtel sim on 22 Aug, 2021 from a store. They said it will be activated within 24 hours. But today is 29 Aug, and still there is no sign of any reception of network and the sim is still not active. I wanted to buy an Airtel sim because my primary sim Jio has network issues. But I ended up in activation issues with Airtel.
It was for my online exam, the exam is to be over soon but I have not got the connection of Airtel.

Please help.
The details of ghe new Airtel sim are-
SIM No.[protected]U
IMSI No. [protected]
Mobile No. [protected]
Packed on :[protected]