Hey Jakub and ClaimAir, Thanks for the help, I got my compensation after using ClaimAir service I took Wizz Air from Prague to London and it was 3hr delay. after negotiating for months with Wizz Air customer service, they used loads of excuses and just refused to compensate. Therefore I found ClaimAir, they effectively kept me up to date and been very supportive. I received the compensation 8 weeks after my registration for ClaimAir. I was really happy with the service and I'll be highly recommend people who have the same situation to go for their help.