Has anyone had issues with armitron watches.?

I love my Armitron watch i got from walmart a few years ago, but it pisses me off that when i changed the battery a year and a half ago, the back plate would not go back on. Ive been to countless jewelers and watch stores and no one can seem to get the stupid thing back on. I really like the look of this thing and want more use of it. Any tips or ideas?? I live in victoria BC canada if you know of any places that can do this kinda stuff.