Glue

I bought a pair of nike air force 1 University red i told the female at the store that the glue has a bad quality then she told me if it comes loose i can return it, after having the shoes and wearing it on weekends the glue came loose 14 days after the 6 month end period. They store told me that the 6 months period has passed and i am not happy as i paid R1600 which is alot of money for shoes that has a deffect and it came loose