I have gotten two calls from this number in the last 5 minutes and as many as 8 calls a day from similar numbers trying to sell me the same things.  How do I stop this?  After I ask them not to call me again, they just hang up.  I call the number back and it says it's been disconnected, which is a lie because they called me back again from the same number.

Solar energy

3 calls today. All same trying to sell solar. Asked to be removed and quit calling. Still calls

this number is no longer in service -- spoofing number -- do not answer

do not know this number, they called 3 times in the last 15 minutes, so I answer "what are you selling or what information are you stealing today?" you can hear others in the background making calls, they hang up with out saying anything. I suspect at this point they are just calling to harass me with calls.