I find that I rarely get satisfaction using email. I suggest making phone calls. Be sure and document everything carefully. Here is the contact info from their web site.
CarJet Iberia s.l.
B-96844386
Calle del Greco 4
03016 Alicante
Telephone 0034 96 515 3500
Fax 0034 96 515 7054
I have a few comments:
First, I see you charged your purchase. I would talk to the credit card company. Here in the US, credit card companies will sometimes get involved to help resolve a complaint.
Next, to find info on a Spanish Consumer Protection agency, I would contact your nearest Spanish Embassy or consulate. They might be able to assist you.
One final note: while the company is now called CarJet Iberia, it has NO relation to Iberia Airlines.
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Michael Steinberg
Editor
BizTrip
http://www.biztrip.com