Loriasel (cadwells silver) broken

Rokiisun

I got the quest called the dominions conquerer (?) its basically the quest which allows you to enter Loriasel to defeat Ruuvitar, but the quest bugged for me and I could not reach/find/actuvate the pillars to open the main door so I abandoned the quest hoping that it would reset but now I cannot get this quest back or progress in the game! I went back to the hatching pools to see if there may be a quest giver there and searched most of the map but cannot get this quest back. Can someone point me in the right direction? Many thanks