I KEEP getting these calls on my home office line, they call and block the number, they call again without it blocked, freakin annoying.

These same a**holes have been calling my cell phone every day for months. They call from a different number every time, but I never answer. I just cut the calls off before they can leave a message. I think they have been calling my home number too, but I don't have caller ID and they hang up when my answering machine comes on. Somebody needs to shut them down!
A different company called Southern Energy Managment has this posted on their web site. "We don't do telemarketing. If you received a call attempting to schedule a "free home energy survey" - please be aware this is NOT our company, but a company in Florida doing business as "Southern Energy Solutions." We have filed a complaint with the Florida Attorney General." Good! I hope they put these [***] out of business!
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Call and do not leave message.

These people are scum!
They are now calling from "burner" cell phones thru an autobot that will start a recording if you answer.
You do get a chance to set up an appointment if you listen to the whole thing. You are transferred to a very busy call center and the people there do not care about anything but getting YOUR info and setting an appointment so they can scam you.

Beware!!!

If you have the time, you should get a live person on the line and then ask them to hold for a sec, someone is at the door, baby crying, aliens just landed in your backyard, etc. and hold them up as long as possible.

Or you could just shine them on and give them your worst enimies' name and address!
They call from many numbers in 407, prefix 233, 232, 925, 928, 749, etc.

We got the same message over and over on the answering machine as everyone else is describing.  I work in the energy efficiency business and I was suspicious.  I managed to pick up the call and press 1, and spoke to a nice but not very professional young lady.  The conversation progressed ok until she tried to schedule an in-home visit and I told her that since I had never heard of them, I wanted to check that they were a legitimate business before allowing them to come to my home.  She hemmed and hawed and finally the line was disconnected on their end.  BEWARE!