Great insurance company with bad service providers

I lodged a claim using the app with Naked insurance... The process was smooth and quick. Thank you so much for that. Problem is the service providers that naked uses. I have a car hire option with Naked... However, I did not expect to pay tempest /Europcar an additional R1200. Upon collecting the car I paid R1650 deposit, only R470 was refunded. No one breakdown or invoice was sent. I need to know what happened to the rest of my deposit, or at least how it was distributed. I've read very bad reviews about Europcar hire and was very sceptical of them. But because Naked uses them, I had no choice but to use them as well during my claim process. I'm very unhappy!!!!!