Poor service

Bought a screen protector and had it fit in store, was told if it comes loose in first 7 days they will replace. Guess what, came loose, started cracking. When I took it back 2 days after purchase(for R300). They refused to take it back. Saying that it cracked. So in my opinion if it comes loose in one end it will crack. So I effectively paid R300 bucks for two days. Not happy with the product and super disappointed with the service.