Domain Mapping – directing to a bad url – can't get to the site or wp-admin!

In basic terms, we sell a website package.

ALL the websites are subdomains of

We use the domain mapping plugin to redirect “” to “”

I went in an now a site is redirecting from “” to ” http// ” (notice the lack of a colon or www.)

Now I can’t get to the site without network deactivating the plugin from our main site. How do I fix that? :disappointed: