Removing lost band from account

I lost my original Band and bought a replacement. (which just arrived)

I know I can only have one Band associated with my account. Problem is, when I attempt to remove my lost Band i get a timeout message and cannot delete it. It appears the app seeks to talk to the device being removed.

Since I can;t delete the (lost) original, I can’t add the new one.

How do you force delete a band that is missing?