Dig under all along the front of the steps. take multiple large, super heavy duty "C" clamps and place them along the front. Lace them with a cable so they all carry the same load and carefully pull them out. Be careful and don't rig anything that can come loose and throw those clamps.
Another way is to dig along the front again and take a large piece of heavy wall pipe. Cut a slot that will fit over the bottom step. Weld a couple of up rights on the top of the pipe so that when you pull the up rights the pipe rotates and bites the bottom step. Kinda like a pipe wrench grabs a pipe.
Another way is to dig along the front again and take a large piece of heavy wall pipe. Cut a slot that will fit over the bottom step. Weld a couple of up rights on the top of the pipe so that when you pull the up rights the pipe rotates and bites the bottom step. Kinda like a pipe wrench grabs a pipe.