We are absolutely shocked... We asked you hundreds of times about if you needed something and your answer was always "no, thanks"... You knew that we have air heaters at clients disposal and about the mattress cover, of course is breathable but protective, for that it is there!
It is not fair that you blame the flat for something that happens because of multiple causes as not to wear the correct clothes (very common here where people see the sun and dress like summer season) or the normal adjustment to a different climate where yes, near the sea, there is a high level of (Website hidden by Airbnb) all the island, my Lord!
You should know that when you suffer regrettably an illness abroad, the prices depends on your insurance company and it has nothing to do with your accommodation (even we have an agreement to offer 24/7 medical assistance to help, what else we can do to help?).
It is incredible unfair and you know it... the time will give us the reason because the truth always wins.