The agents lied to me and the landlord constantly. I was told the the property was mine long before it actually was secured. The contract is full of illegal and unfair terms. My solicitor described it as "unenforceable". My personal details were sent to several companies without our permission causing me to get lots of unsolicited junk mail. The agents took it upon themselves to change the electricity supplier, and thus pick up a commission, without permission from me or the landlord.
They lie, they overcharge, they sell your details and their contracts are full of holes.
What agent could do to change your mind?
Stop lying, reduce your extortionate fees, stop bullying, teach your staff basic ethics and learn some property law.