Inline error for blocked registrations

Hi,

I tried the free trial and it worked great. I’ve just purchased 3 years but now I’m having a small issue and I’m hoping that you can help please?

When a registration was blocked on the free trial it just showed an error message above the registration form that was fitting with the website style. I’ve noticed that I can now customise the error message that is shown but since doing this it now it redirects to a page that is branded up with your logo and it doesn’t match the style of my website. Is there a way that I can get custom the error message to show above the registration form or alternatively style the page that the user is redirected to?
You can test this by using any @justfreemails.com address because this domain is on my blacklist.

The page I need help with: [log in to see the link]