Hi Renzo,
My 2 cents,

Ive never been tempted but, i know a gent whom has bought such an idea or "********" last year, he is a customer of mine.(they tried my wifes boss also and he is an accountant, he nearly paid them a sh*t load until my wife told him to talk to me first, lucky boy !)
I spoke to him about it and he went through the same drama.
Find out if they are based in QLD, if they are it is because the rules and regulations apparently up there have been manipulated to make this sort of thing easy to do, it apparently ties in with the "growth" of the racing industry and investment in that area,people in certain spots are turning and looking the other way, sunshine or gold coast, thats what this fella told me, what he did was this and he got the majority of his money back was,

lodge a complaint with asic,
lodge a complaint with the police both in nsw and qld(making sure you get referance numbers),
lodge a complaint with the federal police,
Go to your local member of parliment,
Attatch a lawyer to it (started with a cheap black and white no frills brand, you know the type tucked away in the back streets)
He then sent them a letter of demand, with all relevat attatched documents together with a letter of intent to take them to court for his money and costs.

He said that it was enough to make them pay.
What they do is suck you in, take your money and the old trick, most people will just give up when things get too hard, what im saying is keep at them, they prey on people just giving in, keep ringing the bast@#$*s, fax them, email them, keep a log of this, they will either slip up or get tirred of you pestering them.

Well, its up to you !
but just a tip ! slow and steady wins the race, you could have started with your 5000 bank and sslllooooowwwllly built it up and up, anyway good luck
Cheers and stay at them