I stopped a while back and don't remember the combination. any help?

If you're talking about the part in the dungeon where you have to key in a 3-number combination, you'll have to replay the whole dungeon to know the correct answer. The combination changes everyday, and is different for all players.

Whenever there is a text where Jinxie goes "there is XX amount of chests/ figures/ etc... I wonder if that was important", you'll have to take note of that number. This will happen 3 times before you reach the door, which will give you the 3 numbers you need.