I completely agree Holidaycars.com are a complete RIP OFF, SCAM and SCUM.
I had booked a car with them in Morocco and when I arrived at the airport their supplier "Carwiz" wouldn't answer the phone. At the end I was forced to find another car right there and then which cost me double my booking price.
After bringing up the issue they asked me to send all the documents for my flight, my call log and the new contract for the new car I got from the new supplier. I sent them everything and all the proofs they required.
After several months they told me they would not cover rehousing fees. It's the poorest and worst service you will get anywhere. DO NOT BOOK with holidaycars.com or "Carwiz" at any price unless you want to have a MISERABLE EXPERIENCE