Need to repair your iPhone? See your service options, their costs by coverage type and how long they take.
support.apple.com
If you bought AppleCare Plus with the phone then it's covered for low price accidental damage repairs for two years from date of purchase. If you didn't it's full price.
It will likely be a service replacement. Either contact Apple via website for a mail-in repair or use this link to book an appointment at your nearest Apple Authorised Service Provider as there are no Apple retail stores in Ireland: https://locate.apple.com/ie/en/