I purchased 200 gb of memory and I can’t take videos or pictures with my camera

You did not purchase memory.

You purchased iCloud Storage. Which lives in an Apple server somewhere, not on your phone. As such it has no effect on the physical storage on your phone.

If you need more physical storage you will need to delete photos and other content from your iPhone. There is no way to increase the storage space on an iPhone.

MariaMata wrote:

I purchased 200 gb of memory and I can’t take videos or pictures with my camera

You can always trade your iPhone in, and purchase one with more memory if it suits you better.

Apple Trade In - Apple

you bought more icloud memory to backup or sync, not for internal memory.

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