You talk about different things here. Channels and Alby Hub are completely related. Channels can be closed in any lightning node - this is the basic concept of lightning and also important to make sure you and the channel partner are in full control.
Alby Hub integrates some LSPs but Alby does not provide any channel services.
If your channel was closed you can check with the channel partner. Or you're free to open a channel to any node that you like.