Thank you, ***** ***** still be covered under basic contract law. I do not know the case law in that county; however the basic principle of contract is the same. If you have contracted them to do a job, and they have not done it to the required standard, they are in breach of the contract. They require to remedy the matter. If they refuse or this is not possible the contract can be terminated and you can make a legal application to recover your losses if they are not willing to compensate you. As this is over 2 counties you may require an international lawyer to assist. You will likely find one based in one of the large city firms. However, you need to try resolve this yourself in the first instance, however if that is not possible, you can look at legal action.
I shall provide you with a helpful link that will assist you in finding a solicitor/representative near your local area. This will provide you with someone nearby your area who can assist you if required.
I hope this information proved helpful. You will find a local solicitor who deals with these matters on the law society webpage which is as follows;
https://www.lawsoc-ni.org/solicitors (N. Ireland)
Hopefully, I have answered your query in a way that is simple and easy to understand. If anything remains unclear, I will be more than happy to clarify it for you. In the meantime, thank you once again for using our services.
Should you require any further assistance on this matter, please do not hesitate to post a further questions for additional assistance.