I am very weary now and wanted to warn other users and would like an official e-mail from an @adobe.com manager to report this user, but also help with my issue. (if you cannot access my email, if you post with an adobe forum badge I will trust your DM)
I do not think you have been the vicitim of a p*h*i*s*h*i*n*g scheme. But what is your Adobe Case Number? I will ask a senior staff member to look into this matter for you.
If you don't know your case number, please log-in to your account below with your paid ID and password. https://account.adobe.com/plans Scroll down to Support and click on View Support History. See screenshot.
For what it's worth, online chat is a secure communication portal. In my experience Adobe agents are very eager to help if they can. My credit cards have 15-17 digits, not including PCI verification codes. And if I suspect my card has been compromised, I report it immediately to my bank / credit card company.
Nancy O'Shea, Adobe Product User & Community Professional Alt-Web Design & Publishing ~ Web : Print : Graphics : Media