Trying to wiggle out of warranty

<p>Booked in my Sony M5 for an in warranty repair at Vodacom because the mic isn't working. Vodacom in typical fashion tries to wriggle out of the warranty repair because there is a small crack on the glass back of the phone (which has been there since a week after I got it) and has nothing to do with the broken mic.</p> <p>This is not an out of box failure where it might be expected that the device is in pristine condition. This phone has been used for months and cannot reasonably be expected to be perfect. I would understand if there was internal damage from a fall (despite the phone being shock proof) that it would void the warranty, but superficial damage that I don't care about repairing cannot void the warranty, otherwise car dealerships would deny an engine repair for a paint scratch on the door.</p>