Can I get a refund if an Airbnb room is uninhabitable due to extreme heat? [Spain]

I'm staying in an Airbnb in Madrid during the current heat wave. The listing clearly stated that there is no air conditioning, so I knew that before booking.

However, what I didn't know is that the room is on the top floor and seems to retain heat all night. Outside temperatures dropped to around 21–26°C overnight, but the room stayed unbearably hot (it felt close to 30°C or more). There was only a fan, which didn't make a noticeable difference.

I barely slept at all and started feeling physically unwell (chest pain, headache, and generally feeling overheated). I've decided I need to move to a hotel or another Airbnb with AC because I don't think I can safely spend another night there. It is not about comfort anymore.

I understand that "no AC" was disclosed, but I don't think it's reasonable to expect a bedroom to remain this hot overnight. The listing also didn't mention that it was a top-floor room that gets extremely hot.

Has anyone had a similar experience? Do you think Airbnb would consider this room uninhabitable and refund the unused nights, or would they likely deny the claim because the lack of AC was disclosed?

Any advice or experiences would be appreciated.