Bharat Sanchar Nigam [BSNL] — BSNL Broadband registration

Address:

Bangalore, Karnataka, 560067

On october 3rd 2016 i registered for a new broad band bsnl connection thru bsnl website registration form. October 4th i got a call from a person claiming to be bsnl executive and he explained me about the plans and he took all details.
By evening he send an executive to collect money of 1591 and documents for futhur process. The person gave a bill and visiting card of avim global solutions and told me that i will be getting a bsnl connection in 4 days.in that particular situation i thought bsnl has involved some third party for broadband and did not doubt the person.
Now that i am trying to call all the mobile numbers he gave everything is switched off. And i contacted the bsnl office they told me that this is fake and there are many chating going on like this.
Though bsnl is aware of this kind of cheating going on was there any action taken from your side to stop it or trace it?
I have the bill and visiting card they gave will it be of any help to trace these people?