I just bought an extra 50 GB and Im only using using 5 and for some reason it still says I have no storage
Thanks for participating in the Apple Support Communities. We'd like to know more so we can help. Just to clarify, are you seeing an alert about iCloud storage or device storage? If you're seeing an alert about device storage, purchasing iCloud storage will not help increase device storage. Learn more here: What's the difference between device storage and iCloud storage?
If you need to create more device storage you can see how much space your apps use and delete the ones that you don't need in Settings > General > iPhone Storage. You may also see recommendations to optimize storage there.
If you purchased additional iCloud storage and aren't seeing the storage you paid for in iCloud, make sure you followed these steps: Upgrade to iCloud+.