Share 'Danelectro 59 wiring issue'

I bought a  danelectro 59 guitar (maybe second hand, but they told me it was new) it has the problem the 3 positions switch doesn´t work (its off) at the neck position, the pick ups work , the volume in the middle position is louder than the bridge. It seems a wiring  issue when they treted to fix a ground issue they told me it has before sold me