There is no email address. You must use chat or phone.
Tip: someone may contact you to tell you an email address. Look closely at it, because it won't end @adobe.com - this will be a scammer, who wants your money, access to your computers, your Adobe account details etc. etc.
I don't see any Adobe Stock subscription associated with the Adobe ID you are using here on the forums. Please confirm your subscriptions by logging into https://account.adobe.com with the correct Adobe ID.
If you are having issues reaching customer care then I'd recommend signing using private or incognito mode when accessing https://helpx.adobe.com/contact.html. You might have a browser extension that is interfering with the site.