I cant turn off or reset my iphone 8+ it is in loop

Good morning Saila,
It sounds like you're having some trouble with your iPhone 8 Plus restarting itself. I'm sure you're eager to get your iPhone working normally again, so I'll be happy to look into this with you.

Here's a great resource for issues where an iPhone keeps restarting itself. Check out these steps here: If your iPhone, iPad, or iPod touch unexpectedly restarts - Apple Support

Let us know how these steps go.

Take care.