How to fix a fastener on a pod? I have a nice different Oakley bag and after a few months...

I have a nice different Oakley bag and after a few months I kinda complete it with too much stuff and one portion of the zip have come off one slice of the runners bit?

Anyone have any accepted wisdom on how I can make it so that the closure is on both runners?

The only impression I came up beside was pulling the two bits apart and the closing them again so that they be on both runners?
My garage is heaving out of the ground...
Answers:    What you did is about the singular thing you can do, save for replacing the zipper.
Good Luck

Merry Christmas