I booked a flight one way and I needed to change the date. I used their online chat and was sent an email quoting a total charge of 155 pounds9admin charge plus fare difference). I told them to go ahead and heard nothing back from them for a week. When I chased it they told me that the difference was over 1000 pounds. I could actually buy a ticket directly from Lufthansa for a cheaper price. I emailed countless times but they never answer your queries. Its just a standard reply and noone calls you. It is incredibly frustrating. I told them they have to honour the price I accepted and told them to go ahead with and book but a month later still no luck. They are awful when there is an issue.