This number has called several times, they never leave a message and when called it is either busy or no answer???

Got a call from this number. He says he's from bc wide furnace. He told me if I didn't get my furnace cleaned it would affect my house insurance. When I asked him to explain how it affects my house insurance he hung on me. Then I called him back so he can explain how it affects my insurance he didn't have a answer for me and said if I called again he would call the police for me harassing him. Guess when a company does false advertising that's how they get rid of people that catch up on there scam