Videocon d2h — channels are deducted without no reason and no information.

My name is dinesh.
I think most of the companies all doing scam with indian.
They r charging double tax.
Old tax + g. S t.
Without deducting old tax.
(Price + old tax) + g. S. T = m. R. P.
I m using videocon d2h, i. D.[protected].
I have called many times to videocon d2h for getting information about their base pack.
Bcoz they have increased their charges and deducted some channels too without informaing.
This is a double fraud.
I was using golden pack arround 220 rs (With tax) + sports pack arround 60rs (With tax). It means total 280 rs (With tax.).
But after gst they r applying invalid double gst 18% + 18%.
1. 220 (Including tax)+18%
Which is arround 260 rs.
2. When i took sports pack of 60 rs.
They r not charging 18% gst on 60 rs.
But they are charging tax on 260+60 = 320 rs.
Which i have paid 18% gst on 220 rs already.
Why i should i paid double gst.
They have deducted some sports channel when i m already paying for this sports pack since 5 years. I think all companies are doing fraud to all customer.
They are charging invalid ammount.
I called many times to customer care of videocon d2h to know about their base pack + sports pack + gst.
But they always refuse to give me information.
Coz its a big fraud and scam.
I have a request to govt.
How can i file a case about comapny's frauds.
Mob num.- [protected].