BC hosting is it still part of Creative Cloud subscription

Just received this email from Adobe BC regarding a number of sites hosted on the platform.... please note, these site were created in muse a couple of years agao and have been working fine in all that time, and we have full CC app subscription since 2014 (with a annual payment).

Greetings Mark,

Our records show that your site has a licensing issue and requires your immediate attention.

This means that either your site has an unpaid invoice which is 7 or more days past its due date, or your site license is no longer valid because you have changed or interrupted your Creative Cloud subscription.

The administration access has been temporarily disabled, leaving only the payment page active. We would like to help you rectify this as soon as possible in order for you to regain administration access to your website.

If your site has a Business Catalyst subscription, please make sure you pay the overdue invoice(s). If your site has an Adobe Direct Subscription, you will need to upgrade to a Business Catalyst subscription. To review and pay the invoice(s) or change your subscription, please login to the Administration interface of your site:

www........ my (site here etc)

Once the payment has been received your website administration section will be re-enabled and you will be able to log into your site.

IMPORTANT: Should payment not be met within 21 days, our system will automatically disable your website’s front-end as well as delete any email accounts and their inboxes.

Should you have any questions regarding this or require assistance, please do not hesitate to contact our support team.

Thank you,

The Adobe Business Catalyst team

Very confused, as we have had no notification emails from Adobe prior to this, any help or advice would be greatly appreciated!