No message was left

They didn't speak when I answered the call...so I have added them to my blocked call list.

Caller: Solar solutions

Cold call; trying to sell solar panels!

Caller: Solar Panel Scammers

No message left. But can only assume it was solar panel scammers or something similar. When will they learn.

Caller: No idea

Suspect scam as no message was left and when I tried to call back doesn’t ring straight to busy tone
I tried several times same outcome

No message left

Phone listed number as Potential Fraud, then Reported Telemarketer. Denied caller did not record any message