Hello mujt434,
Welcome to Apple Support Communities. It sounds like you're having trouble with storage on your iPhone. I'd be happy to share information that may help.
First, you mentioned purchasing additional iCloud storage. Adding iCloud storage will not add more physical storage to your iPhone: About storage on your device and in iCloud.
Next, take a look at this information about storage on your iPhone: How to check the storage on your iPhone, iPad, and iPod touch.
You may also want to take a look at the information here about managing your photo and video storage: Manage your photo and video storage.
Take care.