The free features shouldn't add any cost. You may want to have a look at your actual bill and make sure that the $2 difference isn't just in taxes or surcharges or somesuch. The bill should lst if any additional features are adding costs.
That said, you can remove features by calling Verizon, via the Verizon Wireless website, or the My Verizon app.
On the website, from the top navigation bar, navigate to My Verizon > My Plan & Services > Manage Products & Apps. Then select the "Manage Your Products" tab, select the line you want to remove features from, then select "Remove From Account" on the top-right of the listed feature.
From the My Verizon app, press the menu button on the top-left, then select Account, Add-Ons, then select your line, and on the "Your Add-ons" tab, select "View" for the feature you want to remove, then press "Remove."