Scammer started calling on landline also. .

I received a call on my landline number through IVRS recording that all my connections like Broadband,landline and mobile will be disconnected after 2 hrs by my service provider Airtel because my registered mobile was already registered in some other city.I told him let it be disconnected n told that It seems to be fraud call n disconnected the call.That call was really froud call which I come to know through Airtel customer care. I suggest not to panic in this situation. Don't even reveal ur mobile,name or any other personal data without confirming through reliable source n save unselfish from any fraud.Now scammers has started calling on landline numbers also.