Defective Product Return

Bought new Nike soccer boots from Tekkie Town and they fell apart the first time I used them. I took them back and they told me they can only replace them or refund me after they send them to their supplier to be assessed (the tongue had detached completely from the boot). This they said would take about 3-4 weeks - for boots that I wore once. However from my understanding I should be able to exchange or get a refund within 6 months of purchase for the defective product without any issue.