Bad batch of Nike sneakers (no quality checks)

Super annoyed with Zando. Had multiple issues with the same sneakers. Bought a pair of Nikes for 3000 rand. First pair has spilt glue all over it, they replaced it 10 days later. The second pair was defective and they said oops must be a bad factory batch of Nikes. Even though they have quality checks on all the sneakers. Still waiting for a refund 9 days later. Wasted 19+ days on 2 pairs of sneakers I've had to return.