Thanks for the links,I used Argus(cartrawler) in February and it was through them that I ended up with Sol -Mar, although Argus were quite supportive over the phone, it took me 3 -4 months of constant ringing to be compensated for a wasted day of my holiday, and toll costs for a car that frankly should not have been on the road, let alone rented out !!!
I should have returned the car the same night ,but this was the second car that night, as I rejected the first car which  had bald tyres, and as  I landed at 5.30 in the evening ,by the time I was on the motorway with the second car it was after 9.00 pm, I rang Sol-Mar at 10pm  and was promised the car would be swapped for me the following morning, not that I would have to drive back up to Barcelona the next day, with Toll costs and fuel,at my expense and a precious day wasted up at the finca.
By the way I used the link, and if you compare two sites carhire3000 and rentacar which are the same webpage, just the  top heading different, with a tenner difference in price for same car, and again you cannot tell until you book who the hire car company is also on this  site what the fuel charges are ?? but as well as Hertz and Europe car there is Gold Car as one of there recommended companies, who are they trying to kid !!!  if I could afford to pay a extra hundred or more with one of the big boys, then  there  would be no problem !! :'(
will let you know the outcome
Thanks
Phil