Boirewell problem

#1

In dindigul, near by village we have started drilling borewell. At 350 feet (no water) , the driller had stopped and trying to remove all pipes. He said, sand dust is not coming because nearby (already in use) bore may be connected with this bore. Some times the dust may  return back and there may be a change for damage of pipes. But we are expecting in 450 feet, will get sufficient water.

I want to know that can i try drilling for some more feet by some other driller. Will i get water. OR otherwise the drill is waste for ever with 350 feet.
with regards
cha