Caller ID says 'Security Termit", when I answered, there wa a short pause then hang-up, each attempt to call them back is met with either 'Circuit busy' or 'voice-mail full'

We use a company called Pest Bear in Fort Myers & have for many years. We got a phone call from this 813 phone number & the man said that our current contract doesn't cover subterranian termites & for $17 extra dollars per month we would be fine. He said he was calling from their headquarters in Tampa. I said I would have to think about it & would call the company in Fort Myers. He immediately told me not to do that because it had to go through the headquarters. I did call Pest Bear in Ft. Myers & they told me their corporate headquarters is located in Ft. Myers & our contract does cover subterranian termites.