One email a day Left a with a closing message saying-cancel before billing starts Ft Lee , New Jersey

Got a call showing unknown, don't answer unknown numbers at anytime.  Noticed that a voicemail had been left, so checked my voice mail.  A male with an announcer sounding voice starts with "This is not a Telemarketing call" but verification of your subscription to one email a day".
Yoiu can call us back on 877 567-7303, or email us at support@oneemailaday before billing starts.
I am aggressive with telemarketers, having reported several to FCC successfully ending our interaction.  
Had to check the net to see "who is the heck".........of course, they want you to call back so that your telephone number registers which becomes their authorization, so I will be sending a very strong letter certified to this organization.

I am sure that the billing is done through your telephone provider, what else would they have to show proof that I am anyone other than a telephone number.

I would suggest that if the calls continue.............log the date and time, if a message is left, briefly describe what was said.

Just a "beware of unknown callers"