Wheelbuilding / Wheel Building / Wheel build help

while trying to tighten up my rear wheel spoke the rim suddenly went full out of shape almost like a pringle even though I went around doing just half a turn with the spoke key all the way around. Now to get it to miss the brake blocks I have some stupily tight spokes and some pretty loose- any ideas on how this can be sorted without rebuilding the whole wheel?

Sounds like a dead rim to me. What make / model / size is it?