Basement has no ceiling

I can't seem to figure out how to fix my basement, I just finished a new build and it was going just fine until one time when I went up a level from the cool basement I just worked hard on  to the ground level an the main room of the basement, not all of them, is completely visible in the back yard as if the basement room has no ceiling . I have tried MANY things to try to fix it but nothing has worked, so far I tried tracing the rooms walls with the build tool in hopes of it adding the ceiling back, obviously restarting the game, using the rise foundation arrow to lower the room (which btw is also glitched, now I can't lift it back up an there's a layer of dirt going down to it like a lake that hasn't been filled with water) , my room including the use of half walls so I'd have to save the room in 3 sections and put them back together like Legos or just delete the entire room and build it again from scratch. (I have no Mods or CC)