Airtel — some fraud call addressing airtel service center using abusing language later

Address:

Mumbai City, Maharashtra, 410209

I got some call on my post paid no [protected] from [protected] stating that he is talking from airtel service center named as Ashish Sharma.
Insisting to reply some message and was unable to explain the reason to do so.
Later on he started abusive language on which i also replied in abusive way.

In last he threaten that airtel will disconnect above said no in 1 hour.

My complaint is about authenticity of this call.
If it is authentic then about the employee who was addressing this call.
He is not clear about the process for which he is convincing customer to do so.
And third his arrogance behavior