Fist of all i am sorry to hear that you were not happy with your holidays.
You should have let us know about all these problems and specially DEDDING BUGS (if of course so) straight away. We would have come and sorted everything out the earliest.
During your stay, when I wrote to check if you were enjoying your holidays and if everything was alright, you answered that all was "fine". (I still have our correspondence on (Hidden by Airbnb) ) and i truly wander why none of these problems WERE NOT MENTIONED to me then but only on the last day when I came to get paid for the electricity??
I must write that our other guests who only left yesterday, were very pleased with the villa and not only did not mention all these issues,but they loved the villa that much that it is the only property they consider to come back to. Within so many guests we've had so far you are the only one who, with such certainty, talks about being bitten by BEDDING BUGS and excludes mosquitoes completely.
Second, I would like to inform you that the villa very comfortably sleeps 8 people and we have had big groups staying there before.
And finally with regards to your "big electricity bill", your bill was 69 euros for 1 week stay for 4 of you having aircons on (hot mode) most of the time as you said. Yes, per kw\h costs 0.25 cents (with VAT) and if and when you read property descriptions, it is written word by word. So, that is no surprise at all whatsoever.
P.S. Will have to mention the previous guests again, whose bill for 1 week's stay was 28 euros, so as i had explained to you upon your arrival, it totally depends on the use of aircons. Somehow, I am left with the opinion that you were upset with your electricity bill and it gives me the right justify your such unpleasant review. If so, we are ready to return this sum to you..