iPhone Charger broke for the second time!

I had my first iPhone charger, the wire internally twisted and stopepd working, I contacted Apple and they sent me a new one out, the same problem has happened with this one now! Can I still send it back and get another replacement? I have amazon chargers which charge the phone fine but will not sync with my laptop and so I need an Apple one for my computer, but don't think I should be made to pay £30 for a charger when it's Apple's fault they can't make a decent product! My phone is still under it's one year warranty so can I still send it back? I'ts the lightning cable by the way? Any ideas?

Many thanks, Daniel