HERE Maps for Lumia 830 deleted after no being responsive. Re-download?

[Nokia830BG]

Hi, there my father used to have 3 different types of navigations on his Lumia 830. I deleted HERE maps + something else named HERE...because they were not responsive even after restarts, etc. I can't seem to be abel to find them on the Market. What can I do to find them. The maps my father is left with are horrible, full of bugs and glitches, very inaccurate. Please help!