AWS I have a website that keeps going down all the time daily

And the person I have working for me keeps telling me it's getting hacked daily by hackers. When I think it's them doing this to me all the time. I need someone to look into it for me. It's hosted on AWS amazon. I need this fixed. I also need someone to do website updates for me like adding new products for the future. I had the site for years, and never had issues until recently.