Who called from 4048915520

I just recieved a call. I called back immediately and it was a pre-recorded message say asking if I was interested in recieving a "free" $100 WalMart Gift Card.
Spam.

I also just recieved a voicemail from them, talking about a child born with birth defects. If you're going to run a scam you'd think they would be consistent...

It say nothing and saw on caller ID, legal HLP WCA

Said nothing on voicemail and just showed phone #

404-891-5520 recording upon pick up about birth defects. Irritating and unsolicited. Never know if such calls are a scam; don't give out any info.