This morning we took a tour that included a boat ride with your company. Upon arriving at the London Bridge pier, an employee of yours named Carlos, with a terrible attitude and without even saying hello, told our guide "There is no room, the boats are full for an hour so you can leave". Our guide pointed out to Carlos that we had prepaid tickets with priority access and to let us wait on the pier to see if there were any spots available. To which he ignored, turned his back to the guide and just walked away. The guide told us "let's wait for the boat to arrive, maybe there will be space." We waited and when the boat arrived, yes there were seats available. Carlos did not allow us to board and passed other people who arrived after us. He did this simply to annoy our guide. Lousy attitude, bad service and mistreatment for your customers. Don’t use the service.