Vodafone Idea — Not able to make calls to bsnl landline from vodafone idea network

I am unable to make calls to any bsnl landline since many days. Initially was under the impression that it's bsnl problem but. Later realized that the outgoing calls don't connect only from vodafone and idea network. Because if this i and many like me are unable to call their parents who stay in native with no other connection except bsnl. Pls look into this.