My mother has two accounts: One paid account, and one Basic, but can't access the paid one.

I am trying to help my elderly mom fix a situation in her dropbox account. She has had a free account for years. When she moved two years ago she lost access to her old email address and now has a Gmail account. She says she updated her email on her Dropbox account. In July, she received an invite to some family photos and her account said she needed to upgrade to the paid version to access. She did so and has been charged the past two months (she has payment proof). However, Dropbox somehow still has her old email address attached to the paid account (that is where all of her old photos are stored.) but, because she changed her email to the Gmail one, she keeps getting an upgrade message and she can’t see any of her photos. In essence, it appears she now has a paid account (which she cannot access as the password must be reset and the email is defunct and inaccessible) and a free account with the Gmail. She has sent multiple support requests (and I managed to speak to someone at Dropbox who assured me she would hear from someone soon) that have all been ignored. Does anyone know how to reach an actual person at Dropbox support? She needs the old account’s email updated to her new email so she can access her photos. Because her Gmail is associated with a free account, they evidently don’t provide any support. She just wants support in the original account but cannot get into it.

I am doing this on my account to try to get someone to help her. She may be old, but she’s not technologically challenged.