Why does my storage say it to full and I payed the bill

It sounds like you aren't actually making full use of your iCloud storage. Double-check your iCloud settings and make sure that any apps that support iCloud are actually using it. Then, if you need more storage on the device itself, it will automatically use your iCloud storage.

However, there are some limits to this. It only applies to apps that actually use iCloud. Apps that don't use iCloud will use the storage on your device. The only option is to delete the data inside the app or delete the app altogether.

Here are some Apple support documents that you might find helpful:

About storage on your device and in iCloud - Apple Support

How to check the storage on your iPhone, iPad, and iPod touch - Apple Support

Manage your iCloud storage - Apple Support

iCloud storage is independent of iPhone storage. If you need more space on your phone, you will need to delete something.