I have had one experiece in not being listed or hard to get listed and the only discerable difference was the hosting done by GODADDY all other hostings were up and fine..
also having taken a look at posting
Villas and apartments in Kefalonia,self catering holiday villas with pools,Agia Efimia, Kefalonia the problem may be in the code for ranking
<title>Villas and apartments in Kefalonia,self catering holiday villas with pools,Agia Efimia, Kefalonia</title>
get rid of commas and rewrite focus on product
<title>greek island villa apartment for rent villas island holiday vacation Agia Efimia Kefalonia Greece </title>