Managed to create a map that I'm fairly ok with. Its a bit rough but it should show the basic layout of the dungeon as it is now well enough.

The colours are a bit off in some places since I had to make do with pre-made building blocks from roll20.net

In the ideal situation, would all of the corridors and rooms have an icy texture but this was currently beyond me.

I think I got most of the proportions right, each square is one metre and should thus give you all an idea of how the dungeon currently looks and how big it is.