Missed call from this number, didn't leave me a message

I get calls from this number often, since I live in Richmond Va. it is considered a local call. I never pick up and no message is left. This call number comes in at all times of the day. I finally decided to call it back out of curiosity(kill the cat and all that). I got a busy signal both times. My feeling and I can't substantiate it. The number is spoofed and computers are calling to see if numbers are legitimate.

Answered call, they wanted to talk with Edward. Told them there is no Edward here. They said they would call back later and quickly hung up. My mobile TN has been mine for 18+ years.

Lady saying she was with a breast cancer awareness thing and I said I already donate and whoever was pushing the automated response sh** was glitching out several times then finally pressed the one that said have a nice day. Quickly hung up.