The customer authorization (provided in the link you clicked) is out of date, and does not entitle you to use the Blended Threat service.
https://www.hpsc.ie/a-z/respiratory/coronavirus/novelcoronavirus/guidance/vulnerablegroupsguidance/Guidance%20For%20Older%20People%20and%20Others-Reducing%20COVID-19%20Exposure%20Risk.pdf