Cancel it. They might be a good clinic but no-one here can verify it.... many of us have been here for over a decade and if we haven't heard of them, why choose them over a clinic with a long track record of results? You've found this place at the right time....sit back, read and absorb as much information as you can for 3 to 6 months before you make any decisions.
Dr Arshad in Leeds is your best starting point but there are so many elite doctors in Europe, do some research.