@Linda337, did you rent an apartment? To me it would seem, if you rent a whole place, you are in charge of it. It's disgusting that it happened, and it would be a friendly thing to offer cleaning, but I would not really expect it. Nor wish to wait for it. If the host is not close, he may not be able to send a cleaner on the spot or come over to clean himself.
It's just bad luck, that it happened during your tenue there.
The host might be disgusted too, that you used towels to wipe up sewage. What did you do with them afterwards?
I would probably have asked for a partial refund of the night. As a host, I would have offered that and a compensation for the cleaning effort. (If you did not ruin expensive towels, lol). I'd feel for such a morning, a nice dinner would be a just compensation.
In the review, I would write, that there was a maintaince issue, which made the use of the place not enjoyable at all during one night. The host addressed the issue by sending a plumber the next day, but did not communicate further, nor compensate us for the reduced use and extra work.