I bought 50 new GB of storage, but it still says my storage is full.

My 5 GB of storage were recently filled. It wouldn’t let me take videos or photos, because I had no storage. I needed to film quite a few videos for work, so I went into settings and bought ten times more storage. Sure enough, my iPhone now read “5.1 out of 50 GB filled”. Easy fix, right!? But when I went to take a video, it said “You do not have enough storage to film a video. “ This is incredibly frustrating. I’ve tried everything; resetting my phone multiple times and deleting tons of material. After wiping a few apps clean and deleting so many videos, still no luck. Has this happened to anyone? Any ideas? Anything helps! Thank you in advance.