my magazine servic center I received an unsolicited copy of fitness magazine last month. Today, I received another copy. I called fitness magazine, and they told me it was a third party subscription and I would have to canc Internet, Internet

Last month I received an unsolicited copy of fitness magazine.  I received another copy today.  When I called fitness magazine, they told me it was a 3rd party subscription, and that I would have to cancel through the 3rd party.  They gave me the phone number 18002583350.  When I called that number I reached a recording telling me they were closed (weekend), and that I could email them through mymagazineservicecenter.com.  I am unable to send any email through that website.  I just want the subscription cancelled.  I don't want the magazine, and never subscribed to it.