No puedo administrar mi plan de pagos

As this is a question of an individual plan, I move this from Enterprise & Teams to Account, Payment, & Plan .

If you can't manage your plan, you should contact Adobe customer service. Adobe customer care can be contacted by beginning a secure chat session at https://helpx.adobe.com/contact.html?rghtup=autoOpen. Pop-up blockers need to be disabled! If the chat window fails to open, or is non-responsive, use a different device to start the interaction.
Support phone numbers may be found here: https://helpx.adobe.com/contact/phone.html. Please note that phone charges may apply.

(see also here: https://community.adobe.com/t5/creative-cloud-services/how-to-contact-adobe-support/td-p/11875703 or here
https://community.adobe.com/t5/account-payment-plan/how-to-contact-adobe-support/td-p/11843852)

are you the plan administrator for a team or enterprise subscription?

if not, https://helpx.adobe.com/creative-cloud/help/manage-cc-individual-membership.html