Airtel — airtel wifi dongle activation

We have purchased 6 numbers of Airtel WiFi dongle on Dec 1st and we paid the money also.

But the WiFi dongle still not yet activated, we are calling the person who is from airtel dealer and he is not picking up the calls/not responding properly.

Later he had sent the dongle bill through mail, Please find the attached photo.

Is it really required so many days to activate the service.

Recently last Friday we purchased the Vodafone dongle and it got activated within 3-4 days and we are using that.

Why other operator doing fast and why not Airtel.

Kindly take an action. We paid the money.