D.P.
It's Safari. Not the browser to use with a Mac--especially a newer OS. Download Firefox. You'll love it and never use Safari again!
If you can "get to" the internet--it's not Verizon....it's your browser.
I've been using Macs for 20 years....Safari is the devil.
Have you updated any software (auto updates) lately, in particular security software 9Norton, etc)?