I do not recommend Cartrawler!

I booked and paid a car for our honeymoon vacation via Travelstart. When we got to the agent to collect our car, she informed us that there was no car available for us and that the booking was cancelled. We contacted Travelstart, just to find out that we have to deal with a 3rd party "Cartrawler" in the UK. I have requested a refund from Cartrawler and have send numerous emails, as well as contact them numerous times. It is today exactly a month ago that the incident happened and still no refund. Very disappointed.