They lie to their customers about prices. The actual prices are usually lower than on their website. It's easy to check if you spend a couple of minutes on searching on the internet. I regret I booked through them before I saw the real prices. I probably could have canceled the booking, but I know they will charge me for this and I will get a partial refund in a month (due to other reviews).
So if you want cheap tickets, the Opodo website is not where you will find them. Look for more websites, it will take you 2 minutes. Don't waste your money on these liars.