That little slotted piece is supposed to be loose like that or at least mine was loose like that and the trim is working fine.
Doesn't look like the shaft snapped.
Ayuh,..... I've been wrong before,.... Sorry,.....
Swap the blue and green wire and see if it goes up then
The picture of the collapsed filter may be giving you a hint, the filter looks like it all covered with sludge. If the filter is clogged then the pump can't move oil.
What does the bottom of the tank look like?