As a company it has been a total nightmare to rebook, as I had a voucher! I spoke to many people and I felt everyone was always passing the buck! I was put on a hold a few times and the line went dead for about 10minutes so I eventually gave up! Then everyone was saying different things! I rang yesterday to be told I only had £990 on my voice and would have to pay £600 extra to rebook flights, but then today I had £1,082 on my voucher and only had to pay £338 for the exact same flights!! So be careful! As I company I wouldn't use them again! But I was very lucky to speak to a very helpful gentleman today Nash Davies who helped me get it sorted! If it wasn't for him o don't know what I would of done so thanks Nash Davies for your help!