Making a very long story to a short one:
I've rented a car from http://www.car-hire-uk.com/ on June 16th, 2007 for a period of 4 weeks. All paid in advance!
The car from the begining was in bad condition. It halted twice in two days in the middle of a junction.
On June 18th I called the company reporting the car condition. They told me that JUST next day someone will come to have a look at the car.
On June 19th a RAC car towed the rented car, no new car was delivered.
I had the car for two days having paid for four weeks. They promissed to refund the COMPLETE amount.
Four month later I'm STILL trying to get a refund.
This blog will keep you informed on my efforts getting my money back.