Voicemail Issue

I got a message from a company I would be interested interviewing with while my phone was off. It started with a receptionist who said she is was calling from XYZ and please hold for the recruiter’s message. Then, the recruiter gets cut off…wtf. So, basically I have no idea if these stupid HR people think that they left a message or not. How do I follow up to confirm? I have no phone number.

This is why networking is important…limited HR mess ups.