We would suggest going back to Autoglass in the first instance and ask them to confirm if the screen fitted is a genuine item or a non-original example. You may also wish to check the terms and conditions with Autoglass in respect of what specification glass they use as a replacement. If Kia insist that a genuine screen is required in order for the safety systems to operate correctly, then this is something that Autoglass should adhere to, so you may need to raise a formal complaint. However we would also expect the dealer to confirm if the screen is genuine or not, as suggesting it may not be genuine is not particularly helpful. Either way you should not be having to pay £300 when Autoglass are supposed to replace the windscreen and ensure it is done correctly. Which is clearly not the case.