My car randomly won’t crank over and randomly will

I’ve changed the starter, battery, fuses. The car still won’t crank over when it doesn’t want to. I left it for 2 days and it started right up on its own. Worked fine for a week and now it’s doing it again. It doesn’t turn off on me while driving it just doesn’t turn on sometimes after turning it off or even leaving it overnight it’s a 2018 Camaro ss convertible. Also giving me too not secure on dash even though the top is sealed shut