Malware attack ????

I was browsing on iPhone IOS Safari and had a whole screen pop up hit me looking exactly like Apple format saying “ Apple security alert “ “ Malware has been detected “ your phone and battery has been infected “ “ to avoid further battery damage ( curious, since I have noticed my battery is becoming drained very fast ) Download free scanner app and VPN from the apple store “ and what looks like a apple store page pops up with a timer counting down for several minutes.... the app URL is * going app.xyz * since I’m not stupid I went to the App Store and did a search for “ going app.xyz “ no results...what’s going on ? What should I do ? HELP !!!!