Safecart apparently engages in nefarious - if not outright fraudulent - billing practices. I discovered today that I, too, have been misled (scammed, really) by Safecart as a result of registering a Wordpress plugin - free version - for which the invoice showed Total USD: $0.00 but my Paypal account was charged $97.00. Upon examination of the emailed receipt, the total still showed $0.00, but there was a reference to a "subscription" for $97.00 at the bottom.
Outcome of a refund request is pending, but in the meantime, I reported the transaction to the FCC and encourage those of you who've also been scammed to also report the company to the FCC so that (hopefully) something will be done about Safecart and its nefarious practices. The FCC form is at: https://complaint.ic3.gov/default.aspx?#.
With just a quick Google search regarding Safecart, I found the following links to forums, threads, reviewing sites, etc. relevant to Safecart and its practices:
https://www.paypal-community.com/t5/Refunds-and-cancellations/SAFECART-IS-AN-INTERNATIONAL-SCAM-SEARCH-THE-INTERNET-FOR-ALL/td-p/*******
https://www.paypal-community.com/t5/Refunds-and-cancellations/Block-payment-to-Safe-cart/td-p/*******?profile.language=en-gb
https://www.sitejabber.com/reviews/www.safecart.com
https://www.paypal-community.com/t5/Refunds-and-cancellations/Block-payment-to-Safe-cart/td-p/*******/page/3
https://safecart.pissedconsumer.com/
https://safecart.pissedconsumer.com/my-bank-statement-has-www-safecart-com-purchases**************.html
Why hasn't Paypal blocked Safecart?