Frustrating, unexpectedly expensive, and deceitful.

Interrent charged an additional 191.39 euros, despite easyrentcars receipt saying I'd paid for the car and fully comprehensive insurance and no payment was due on arrival. This was like arriving at the airport for a flight I booked and being told it cost 200 euros extra!? I've then been charged a late charge of 40 euros and I'm still awaiting my 80 euros petrol deposit from May (now August) despite returning the car full and within the hour of the nominated return time. I called several times and was awaiting a response to the emails they had told me to write to. They then directed me to an online claim form, which I've just recieved a response to. They have informed me that the 191.39 is a compulsory charge, even though it was put in the 'Extras' column (therefore not allowing easyrentcar to claim the money back), and not included when or clearly noted when booking the car. It's been an expensive and frustrating experience.