BSNL — Activates caller tune without consent, now no way of getting it deactivated

Address:

Indore, Madhya Pradesh

I am trying to unsubscribe caller tune, but no success.
The BSNL mobile number is [protected].

1. I sent a message with text BT DACT to 56700 ( I got a reply that this code of song is invalid)
2. I tried calling 56702 ( reply, I am not allowed to call on this number.) (On BSNL site it is mentioned to call 56702 to unsubscribe)
3. I tried calling on 56700 and followed the instructions to unsubscribe ( at the end reply with error message)
4. I tried calling customer care numbers [protected], [protected]. ( for the first one reply is number invalid, and for the second there is no reply)

Now PLEASE suggest me what should i do I am helpless.