Out of desperation I had emailed REIV and this is their response today.
"If the agent has agreed to end the appointment you should obtain from them a letter stating that you are released from the obligations of the authority under which they were appointed."
Which the letter I have obtained from my agent after I emailed them treatening if they are not giving to me I will get my solicitor to demand it.
Thanks to both of your reply. It sure good to be sharing knowledge around.