Budley,

The best place to look up Ryanair contact info is www.ryanaircampaign.org

They have phone numbers, fax numbers and e-mails. They also have standard phone numbers that are equivalent to the Ryanair premium phone numbers.

However, if by chance you are planning to demand some kind of compensation from them, then your best course of action is to:
1. send them a letter first
2. when they respond, invariably washing their hands of any obligation, file a claim through the irish small claims court in Dublin. The above web site has information on how to do that. It seems that the second step has a much better success factor.