1 AM Robocall from NDA!

I recived a cold call at 1am in the morning by a recording. Phoned back and was placed in a que where the next available consultant will be with me, hung up. Got a call at 11am again from this company where they say thank you for showing an interest how can we help you. I have never signed up for any informational or market related calls with this company let alone a 1am call. I have no idea where they got my number. But hopefully the Teamleader Nkosati and his Team will not call me again.