@Perrie1
I personally,would do a review and state that a mess was made and that you incurred an extra cleaning charge that you are still waiting to be received from the guest, 8 days after the guest agreed the extra charge...that way it is "banked" and done before the deadline. If there was no damage done and just "mess" then maybe make that clear, just to be transparent.
Maybe the guest is waiting to get paid or something, or collect from others in the group ...but then again you would thought they would have told you that .... it is their responsibility to do that ....the fact they appear not to have, means you have to make your review clear and "up to date" ..in my view