Earlier quoted context omitted.
In the UK, this is less of a problem, though it depends a lot on the contract between the company and the developer. Assuming nothing exotic, that the statement on the site is true (and not a malicious falsehood) and that if the hosting belongs to the end customer they did not revoke the developer's access (i.e. no unauthorised access occurred), then the developer is in a reasonable position legally. IANAL, of course…
So if I'm a builder, can I build a wall in front of your grocery store's door if you did not pay me, as long as I do not lie and I do not break in?
That said, there have certainly been situations where builders have gone back to properties and taken back their property (like tiles from walls, joinery, etc.) but I have no idea how that pans out legally as it's outside my wheelhouse.