The name INFO JIH!!! is indeed correct (information offices in Ostrava are called OSTRAVAINFO!!! but each of them has its own name, in this case INFO JIH!!!). The link I have put to website tag is website of OSTRAVAINFO!!! and it works for me. The subpage of INFO JIH!!! is https://www.ostravainfo.cz/en/information/tourist-information-offices/information-centres/9259-info-jih.html.

The "!!!" is the brand of Ostrava.