Hi Robbo,
First of all I am sorry I misunderstood what you first wrote. If they actually had control of your system then that is a concern. I have seen your R-kill thread over in the security forum with Corrine, i would recommend that you explain to Corrine that the scammer had control of your computer, Corrine is an expert in malware removal and will know what to do from here.
Also in the meantime be very careful using your computer while it is connected tome internet, if it was me personally I would not have it connected to the internet until it is declared clean by Corrine. But if you do have to use this computer make sure you are not going to any bank sites or accessing personal/confidential information.