My electric bill for the two worst months of summer was £78 -- and I thought that was a lot
Bearing in mind that that I'm all electric and I had one of my sons ( plus his girlfriend ) staying with me for three weeks during that time so the air con was hardly ever off I suppose I have got off lightly.
£465 seems to be way over the top --- I think a little investigation is called for.
One thing I would do is switch the main switch off in your house / flat and see if the meter is still moving --- It's not unknown for electric supplies to flats having been tampered with.
One point to mention -- a friend was receiving huge bills and often complained about this --- untill I realised he had his immersion heater on 24 hours a day --- he thought it was like the UK where there is a thermostat fitted to the hot water tank and reasoned that it would only switch in when the water was cold which sadly isn't the case on most hot water systems in Cyprus.
He was blissfuly unaware that he was trying to boil the water in the hot tank for about 6 months.
His bills came down to a more reasonable level after -- much to his relief
Bill