Installing new light--- problems

Needed to replace the light fixtures for my 2 pool lights. I cut the old wire at the light. Soldered the wires from the old wire to the new wire and pulled it through from the breaker box.

Got the wiring for one of my new pool lights ran thru the conduit without too much difficulty.
Started pulling the wire for the other light and it got stuck. It was being stubborn the whole way. Got abt 75% of the old wire out and now it's stuck big time. I pulled so hard all 3 wires inside broke just inside the conduit. I was using water proof lube in the new wire. I had also squirted regular wire lube into the conduit at the breaker box end.
Tried pulling the wire back out from the pool end but couldn't get it to budge.

Any ideas on how I can get the wire out of the conduit?