I didn't answer your review immediately ecause i was not in Budapest, so i don't know exact the situation. i backed to budapest today and talked with the guy who take care of the flat. he did for more than 10 guests (in airbnb and other site), all have good reviews except you, i don't know what you expect for a 35€ flat, funny thing is only you see the dusty, he got good reviews before and after you, so i really doubt about it.
about the electricity, it's REALLY strange. i don't know what's exactly happened. because the next day when he come open the light, there HAVE electricity in the flat. nobody repaired it. because he didn't ask me to pay the repair and i don't believe he will pay himself for repair the electricity... i don't think you lie with it because full of candel stains in the flat after you leave... so i really don't know what's happened. but it's inapproprite to leave a review like this!