How would I complain about this?

Preface to this; shoes are great, this is about one of their backpacks.

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I've owned a Nike backpack for maybe a year now? I bought it in Toronto last year since my current bag (then 6+ years old) had torn at the bottom in the airport. Not even out of the country, when I was visiting my grandparents in Nova Scotia, the side zipper just broke completely, came off the rails and snapped part of said rail in the corner of the bag (and since the bag opens all the way, it made it effectively impossible to close without me taping it shut)

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About 8 months later, I was getting ready to go to Nova Scotia again to visit my grandparents, and decided "hey, that bag was nice, maybe I look into getting it repaired!"

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So then I went all around singapore (hyperbole, went to like 3 guys but since Singapore is pretty small I kinda did go all around the country) and finally found a dude who was able to fix it by putting a nice little piece of material (well color matched too) over where it was to block the zipper from going off the rails again in that corner.

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Now, in Alberta on the way to Nova Scotia, I get to the AirBnB and open the bag to find the zipper is already broken again in a completely different spot ;/ Definitely a quality issue since it was practically empty aside from my Tablet and books (along with cables for said tablet + my phone).

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From what I can tell, there's no real customer contact email for Nike, so I'm kinda lost here on where I can complain. Just so done with the situation atp