Frostbite Quest Trouble

So I started the Frostbite quest today (Level 48 long quest) and I got stuck in a hole in the mansion. I did /kill to get out of the hole but now the quest tracker is pointing me to just outside the Nemract bank. How do I get back to the mansion to finish the quest? Is it even possible to finish that quest on the class I used?

 

maybe you clicked on the map if you are using Wynntils, but try going to the mansion again, maybe you will be able to go in again

 

I would go back to the mansion, but I don't know where it is. After the first part of the quest (before getting to the mansion), I got the blindness effect during some dialogue. After the dialogue ended, I was at the mansion. I don't know where it was so I can't go back

 

It's in the northwest corner of the Lusuco area.

 

Thanks!