I have a empty hotel, I can't build any rooms there and I can't delete it.
Is there anything I can do?

yea thats what happened on my other account. u cant do anything about it really. you cant deleat the hotel and u cant add rooms. its sad.

u cant even see mine

Then how do you delete the hotel?

Apparently it's not possible to delete a hotel. Once you've deleted the last room in a hotel, it gets 'stuck', at this moment there's no way to either delete it or build new rooms in it. As far as I know the only option is start a new account and try again.