calls and calls and triggers the answering machine but never says anything!

Called yesterday and today. Never leaves a voicemail.

I didn't answer, they didn't leave a msg.  Called my cell!

Keep getting calls from this number. Leaves no message. This time I called back immediately, got 'representatives are currently assisting other callers.', option to leave a message, and also an invitation to be placed on "their" (never identified) do not call list, ''State your name and phone number clearly.' I did not state my name.

No message left and no caller id, and upon returning call, the voice mail does not identify the business.