Idea Cellular — some of your representative calling me

This to inform idea cellular. That one lady keeps calling, saying she is representative of idea cellular and some other guy whom i don't know had defaulted his post paid payments, as called me from that defaulted payment mobile number. So now i must pay his bills because my number is in his call list or else she will send a squad and do un thinkable and also she is tracing my airtel number. And she claims if money is not paid for somebody else bill my family won't be safe. Please do as need. By the way i never in my while life used idea cellular network. Her mobile number is +[protected]. My mobile number is [protected] it's an airtel number.