Buckled wall of in ground Liner Pool

I have an 18X36 grecian style in ground liner pool, wall constuction is the 42" tall plastic panels with the braces between panels. Over the past 3 years one corner in shallow end of the pool has been dropping, first noticed when concrete at the edge of the steps was distorting the fiberglass ledge at top of steps and water level was uneven on liner. I cut concrete to relieve stress on step. Now, a year later noticed the wall has partially given way, I feel a crack in the wall panel horizontally about half way up and a concave buckle in one area. Liner is not punctured yet. Pool bottom is concrete, not vermiculite. So also feel a crack in bottom of pool from shifting concrete. I will be repairing this in the fall myself because I love challenges like this...so I was hoping to get advice along the way.

Sorry your post & membership got lost in the crush; not sure if you still need help, but your membership has been upgraded. -ben

Yes I still need help. Local pool company looked at it and believes the walls are defective. There is one other cracked wall and several others which are starting to fails. Its a fort wayne pool may10 years old and apparantly there is some history with this company and defective poly walls. the pool company is checking for available warranty.

Have you ever repaired walls using a stainless steel plates? That may be an option as oposed to a tear out.