Is there a stronger glue for plastic than superglue?
I have used solvent glues with success in the past, weld on , locktight ,scigrip are brands I use depending on the plastic. You would need to get the super glue residue off first. Since you have had problems and it has been repaired I might try locktight plastic bonding set it uses an activator and a bonder or glue. The solvent type actually melt the plastics and the fuse the pieces together.