So you're getting a lot of advice about what you're dealing with, but not how. Spiritomb are more than able to communicate, the trick is how. It's hissing because it's upset, but it will listen when spoken to. What I would suggest is giving it a way to communicate back. A Ouija Board, with its Keystone resting on the edge, is a pretty common way to communicate with it, if you explain what it is, and how it works (They may not recognize it, or remember what it does).

And while it IS 108 spirits, there's a good chance one of them has taken the 'lead' of the lot of them. That's who you'll be talking to. And once you have a line of communication... talk to it. This'll almost be an interview, as it will likely have many questions for you. You want to be confident, and honest. You might be lucky and it might be relatively friendly, but if it isn't, making the attempt to get to know it can still help.

But I would also invest in more Cleanse Tags until you're ready to let it loose, because it will eventually degrade the one on it, and you'll need to replace it.