How recently? the CCR stores info for a maximum of 5 years. Does your CCR report still have data that might impair your credit rating?
Information for consumers about the Central Credit Register
www.centralcreditregister.ie
FSPO?
FSPO is an independent, fair and impartial service that helps resolve complaints against regulated financial service providers and pension providers.
www.fspo.ie
But you'll need a final decision letter from the bank in response to a formal complaint first.
Edit: post crossed with
@Brendan Burgess's but basically agrees with his.