The price they front with is not the actual price, I booked through carflexi cause they had the best price. What I thought was the price was 105£, but in reality I ended up paying 407£. A bit of a jump there. First i sent an email to ask about this, after a week I still havent gotten a response, so i called them to ask what was up with this, the support guy was very unpleasant and didnt even listen, just kept interrupting me. What he said was that the first payment only is a part of the total price and that it clearly says so during the booking. I checked it and it says in the voucher that there will be an other fee, but nothing at all during the booking (went back to their booking sight to test a new booking, same result). Since it felt pointless to talk to their support on the phone I wrote a new email, but I would be surprised if they even bothered to answer it.
Conclusion; DONT EVER rent a car from CarFlexi.