Amazon congratulations pop up issue

Cannot prevent Amazon congratulations pop up - happens all the time now - have followed all recommendations: clearing website data, closing apps, switching browsers, private browsing, settings on to block pop ups, fraudulent web sites, reset ad preferences, etc, etc. Nothing works with one exception turning off Java script - which inhibits ability to view websites using java script (All do!). Am running ios 11.2.6 on iPad Air 2. Note: clearing Website data reduces all sites to 0% but list of websites still remain regardless of remove all function or deleting each on by one. Have to believe the pop up virus is related to the inability to delete all websites and an issue with java script And iOS. Help!