Suspended Account with DNS record pointing to another server not being suspended

Hi

I am using CWP with WHMCS. I have a client who's website is run via Shopify by updating the DNS records but emails, ftp etc are still on my server. I noticed that even when this user's account is suspended, the website is still accessible. I can see that WHMCS and CWP show that the account is suspended, anyway, this can be resolved?
This is probably not common and probably not a bug but rather something that was not thought of.

Thanks

DNS is DNS.  If you point it away from your server, then there's nothing you can do about the other server.  One Option might be to point the DNS at your server, and use a 301 ridirect to shopify.  So when you suspend, the redirect goes away and they see the suspended page.

You will have to manually NULL route their DNS to your suspended page when you suspend if you keep the DNS pointed away from your server.

Thank you. It makes sense.