I am not sure you were entitled to anything until settled, anytime I have bought the tenants scoot before settlement, which means vacant possession.
Your problem is that tenant has still not left after settlement & seems you do not have a proper lease agreement ? should have been in the contract.
Either way, get rid of these people, they seem like it was all under the table, get a new tenant, a proper lease and move forward.
I would also closely look at the manager. As soon as they are found to be behind, something needs to be done.