How I can pay my iCloud storage monthly charges manually

Hello ~ You must have a valid payment method on file. Take a look here and you can get support in the article or for further Apple support go to upper right hand corner and click on Get Support:

Change, add, or remove Apple ID payment methods

~Katana-San~

Hello ~ Can you explain exactly what you mean by manually? Take a look here for info on how iCloud subscriptions are billed:

How iTunes Store purchases are billed - Apple Support

~Katana-San~

pnr57 Said:

"How I can pay my iCloud storage charges manually"

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Find Out your Options Here: Payment Methods that you can Use with your Apple ID - Apple Support

Whom to Contact:

If it is not going through, then contact your financial institution(i..e bank), as this may be being seen as a scam, they that may not be the case. Let them know that all is okay to be proceeded with.

Can’t add payment