Last month I had a horrible flight experience with Ryanair. We left Madrid with a three hour delay and when we were about to land in Stansted we were diverted to Birmingham because the runway was closed for scheduled maintenance (Ryanair must have known this before we left Madrid). We were not given a reason for the initial delay.
As a result of this I arrived to Stansted at 4:40 am, instead of 23:40pm as scheduled. According to EU261 I should be entitled to compensation.
I submitted a complaint through Ryanair's service but it was rejected. In the rejection email it said "If you are unhappy with our decision, you can take your complaint to your local Alternative Dispute Resolution (ADR) body, details of which can be found in our help centre page on our website."
However I am not sure if this will get me anywhere. Does anyone have any recommendation for what to do next?