I have a vinyl pool with stamped concrete decking. Two years ago, the pool ladder was removed to put in a new liner. The installers cut the ladder at the base because they could not remove it. Now, part of the ladder is stuck inside each anchor. I have tried spraying PBBlaster in each anchor, using a blow torch to heat the remaining metal to break it apart, drilling, and using a multitool to cut the pieces out. Do you have any recommendations to get the remaining metal out?