I too have had cold calls from S&B Associates on two occasions. They are very convincing and chat away for ages answering every question including "How do I know you aren't a scam?" Answer "You don't." (At least that was honest.) The thing that really made me suspicious was their money transfer form (sent by e-mail) - very amateur. More searching on the web revealed things to check if you were suspicious:
Cold call, number withheld, phone was a mobile on their website (you wouldn't know this as the codes in Spain are different from the UK ( (0034) 603 are the numbers to beware of apparently), the website has only been up since February, want money up front. S&B ticked all these boxes.
On the second call when I asked about their website I was advised to key in their website name (this blog does not allow me to quote it) rather than a Google search because that would bring up hundreds of S&Bs. Yes it does, including several sites warning about this 'company'! The website doesn't open on Applemac. The website also is very convincing including testimonials. Their address, when you look on Google Street View, appears to be a filling station.
STAY WELL AWAY FROM THIS AND SIMILAR COMPANIES AND DO NOT SEND MONEY UNDER ANY CIRCUMSTANCES