Catlan, sorry to hear you lost so much money, but that is what the court is for to decide who is in the right not the lawyer. In my case using a lawyer saved me a major headache and 12000E. Situations differ some people have a strong case some do not.
Its up to each person to decide if they want to take the advice of a qualified catalonian lawyer or an english estate agent when it comes to matters legal/illegal in Catalonia.
No disrespect to Jools she is well known for outing frauds on this forum.