Nike Tracksuit Quality Disappointment

I bought a Nike zip-up tracksuit top for my son from Barcın at Akasya Mall. I was so disappointed when, after only two hours of wearing it at the mall, it started to get all fuzzy and shed a lot. We quickly went back to the store, and they checked out the product. After spending a lot of money, we had to wait for two whole weeks to get a replacement. But our disappointment didn't end there because the new one also had the same problem of shedding fabric a lot. We returned it again, but this time they said it was our fault and wouldn't exchange it. It's really discouraging. We put a lot of money into buying the tracksuit, but it only took 10 days for it to become unwearable. I really want a replacement because this quality problem has made us really frustrated and we've lost money because of it.