You have a choice - you can go to the Ombudsman or the court, but you can't do both. The Ombudsman is a replacement for the court and not a second bite at the cherry.
If you don't like the Ombudsman's decision, you can go to the High Court, but the High Court will only set the Ombudsman's decision aside in very limited circumstances e.g. a very big error or mistake in procedure. The High Court has recognised that the Ombudsman has the right to exercise his judgement and even if they disagree with it, they would not set it aside.
Brendan