My subscription was cancelled for no reason, what should I do?

I have just subscribed to Adobe Cloud and received this:
“
We are reaching out to notify you that our fraud prevention specialists detected fraudulent behavior concerning your Creative Cloud Pro subscription. As a result, your subscription has been cancelled and you will no longer be able to access the included Adobe apps and services.

For more information, please contact our dedicated customer support line at 866-493-4991.”

Why would that be? I can not call this number, its not even clear what country code should I use. Can I rase an urgent support request or ticket somewhere?