Who called from 7815196434

I was called twice today by this number on my cell phone.  The second time, I called the number back and all I heard was some low quality piano music.  Probably a scammer.

I called back and they said "this is renew, thank you for returning our call" and I hung up. I used *67 before calling. No idea who renew is...

Called the number back, got piano music as if on hold, then a recording thanking me for calling back and pitched solar farm energy.  I hung up before it got any further

Please block call and remove my number