@Natania1
I’m truly sorry to hear that, you being frustrated.
I have sign a agreement with my co host and paid by weekly, so far so good. We come to be the best friends.
You may consider to offer installment to let him to pay you back and also request for bartering.
Suggest that instead of monetary payment they can give you something of theirs of the same value. Communication with him, perhaps he can give you his place without renting payment for certain times and you can find the guest to stay and pay directly to your account. Since he was dishonest, do sign an agreement to make everything clear.
Do you still have the keys?