You can (usually) fix this...
It may take you 15-30 mins.
You will need to take the knobs off from the pickguard, and unsolder the ground lug from the back of the pot (vol) and probably the cap from the back of the tone pot.
Next take a small screw driver and pry up the four little tabs holding the metal treaded top to the bottom of the pot. The pot should come apart in 4 pieces (threaded top, trace disc, shaft and bottom).
To tighten up the lug, carefully bend the two legs on the shaft piece out a little more to put more spring pressure against the bottom piece, then smear the excess grease in the bottom piece to fill in the area where the legs had wiped the grease away.
Re-assemble the four pieces, then use a pair of pliers to squeeze the four tabs back down to hold the threaded top piece in place.
This link is to a tutorial on how to make a no-load pot. You don't want to make a no-load pot; but the link does show good pics and instructions on how to take a pot apart, and put it back together.