Hi,(posted 7745 days ago)Go to the part of this site called 'Do's & Don'ts', and read the part titled 'Don't give away personal information' (and as much of the rest of that section as you can). It should help explain what the implications of what you have unwittingly done are, and how you might counteract this.
You should also issue a SARN (again, see this site - Do's & Don'ts and Repossession) against this agent and the lender.
Read this site - and keep reading it!