The estate agent we are dealing with to buy a house has increased our offer to the buyers without our knowledge or consent. He said it was to avoid more going back and forth of which there has been quite a lot. We are obviously unhappy with this approach -how can we be sure the seller wouldn't have accepted our lower offer? We are still interested in the house but not happy with the agent. We are going to ask him to cut his fee. Does anyone have any experience of doing this?