Beaded is a 2 part - the bead locks into a receiver piece - usually used in IG pools - AG pools mainly use j hooks or overlap.
So sorry to see/hear what happened - definitely caused by the liner shrinking, however, I'm also surprised the liner didn't just rip appart.
if your walls aren't severly creased it could be relatively easy to get going again by installing a new liner - about 300.
First thing to do is cut the wall free from the liner and see what condition the wall is in, go from there. Any questions - post back.