My apple IPhone won't let me get on Safari.

I keep getting a message about "Safari - Alert" Suspicious activity might have been detected. Major Security Issue. To fix it please call Support for Apple 1+800-457-5916 immediately! I called & they took over my laptop & told me that all my devices had been hacked - My network was hacked! Said I had a Major Hacking Issue. They of course said they could fix it for a fee of $170.00! I couldn't decide what to do so I told him that I wanted to think about it & he hung up on me....I don't know what to do!? I still can't get on Safari from my IPhone. Can anyone out there please help me? Thanks!