I am not able to upgrade my iCloud storage?

This is primarily a user-to-user support forum; other Apple users like you.

To contact Apple iCloud support, see: Contact - Official Apple Support

ferdous69 Said:

"I am not able to upgrade my iCloud storage?: for Some reason I am not able to upgrade my iCloud storage. Every time when I click the upgrade it says 'contact the iCloud support'"

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Then do as instructed: “contact the iCloud support”