When I asked cc for not getting these channels, their reply was:
Greetings from Airtel!
This is with reference to your email regarding channel concern for your Airtel DigitalTV account 3*********.
We regret the inconvenience caused to you.
We would like to inform you that Colors Infinity HD, FX HD and Nick HD+ channels are not part of your Magnum 28 HD Package as same were promotional channels provided to all HD customer's free of cost and same has been removed from your account.
We hope that this response has addressed your request suitably.
Warm Regards,
S****** P******
DigitalTV
Bharti Airtel Limited