I apologize you did not read the description of the listing completely. This house is definitely a basic house, as advertised in the listing, with three bedrooms, two air-conditioning units (not one like you mentioned), and a great location near the beach. I have had people here in the dead of summer in 100° heat that have not complained about the air-conditioning units as it is typically great for a small cottage like this. You were here in early October where there was no heat so I'm a little confused what the issue was!
The kitchen is literally what is in the pictures here, yes, a little out of date, but a stereotypical cape cottage.
As to the mildew smell, I went down right after your visit and there was nothing out of the ordinary. I have hosted over 40 people over the last two years and this is the first I've heard of a complaint like this. There is a Cape Cod smell in that area for sure and it is an old cottage, but I have checked it for mold and mildew and found nothing there.
Sorry you didn't enjoy your experience and I'd recommend a more expensive listing next time, but for the price and location all my other guests have loved it!
All the best,