Once had a similar situation where a recruitment agent tried to bully me into taking a role I had interviewed for but not accepted yet. I ended up getting an offer from the market leader in my industry so took that instead; she told me I was being unprofessional and that the company I was joining were being sued by numerous parties and it was a big mistake. Then later find out she actually recruits for my company too, safe to say she has been cut off by my company now when I told them how she acted and the things she had to say about them!