에프터이펙트 플랜을 포토그래피 플랜으로 변경하고 싶습니다.

https://helpx.adobe.com/manage-account/using/change-creative-cloud-plan.html

if that doesn't help you, using a browser that allows popups and cookies, contact adobe support during pst business hours by clicking here, https://helpx.adobe.com/contact.html

click contact us (= cryptic icon in the lower right)

in the chat field, type AGENT
be patient, it can take quite a while to reach a human