Yep that website mentioned by @BSintolerant is eye opening regarding Fierce. Some individuals say they've lost thousands of pounds. She's clearly very aggressive when people try to back out or get a refund, insisting the individual is a business so consumer rights don't apply.
The contract she and Castle handed out to new students of Scamversity was an absolute joke, lots of illogical cut and paste of aggressive sounding paragraphs she probably found in Google, interspersed with her semi-literate input. It's a shame her intimidation seems to work. I'd love her to pick on the wrong person who can see her contract for the joke it is and her coaching for the scam it is and go for her jugular. The woman's a menace.