I purchased more storage how do I get it?

Hi J-1967

welcome to the Apple Community

You may need to turn your iPhone off and back on to see the added storage.

You may see the storage when you check your iCloud storage:

Check your iCloud storage online or on any device – Apple Support

or

How to: Check your iCloud storage on iCloud.com – Apple Support

If needed:

You might want to reach out to the iCloud Support Team:

There is a "Get Support" link (or download and use the Support app) at the bottom of their webpage (link below)

iCloud - Official Apple Support

or

Apple phone numbers around the world

Contact Apple for support and service - Apple Support