I would search for Seville and save the search. I would go through all the sits in Seville, even if they are not active, and favourite the ones I thought would be good for me. Like that, you will get alerts and be able to message the owners. I would also check, as @anon42303101 suggested, that they have been away for Christmas in the past.
This strategy has helped me in the past. I shared my experience in this post
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