This is where domain protection such as that of what Moniker offers is extremely valuable. You don't treat an LLL.com like you would "just another" domain, to the point that it's a simple few clicks once they're inside your account for it to be gone.
You especially don't treat any domain name that way at all, if your business is almost completely dependent on it.
Sadly, domain names can be treated as just an afterthought when running a business, and this is a perfect example as to why that attitude is a very bad one to have.