Hello, balthazerb.
Thank you for visiting Apple Support Communities.
I understand you are receiving a message requiring payment before you can use your browser. You will need to clear Safari web data and close all open applications as outlined below.
To clear your history and cookies from Safari in iOS 8, tap Settings > Safari > Clear History and Website Data. In iOS 7 or earlier, tap Clear History and tap Clear Cookies and Data.
To clear other stored information from Safari, tap Settings > Safari > Advanced > Website Data > Remove All Website Data.
To visit sites without leaving a history, turn on private browsing.
Safari web settings on your iPhone, iPad, or iPod touch
Force an app to close in iOS
-Jason H.