Display is showing weird colors

I Have

an iPad Air 2 64Gb wifi only model , it was perfect but suddenly after coming home I noticed that colors on the display appeared weird and whatever I see on it previously ,appears in the background even when launching another app . I have been taking extreme care of it , there is not a single scratch or nick or whatsoever , I use apple s smart cover and an apple charger ...... it has not even fallen down once!

currently its running iOS 10.2 . I gave it to Macnoni which is an Apple Certified Service center and I ended up getting it back with the same problem . The technician said it is a problem with this iPad series . Come on! I have not seen a single forum where an iPad Air 2 is showing weird colors .

So this is how the problem arrived in the first place : when I took my iPad after coming home , it was fine and then suddenly it blacked out and the display came back alive but it was then that I noticed that the display was becoming weird .

i Have tried hard resetting , deleting all data and starting over but none of these seem to work .

I have an entire range of apple products just because I trust in apple s service and product quality but now all of these seem to have gone. You dont expect such things to happen in an apple product!

Apple I need a definite answer on what to do next . I hope the company won't disappoint . seriously look into the matter !

i have attached some images of the problem.

(in the second image u can see a line appearing in the lower half ( the grey bar) )

the warranty got got over this December but you expect such problems to appear after warranty expiry , only in some cheap product and not in a product from a reputable brand even after taking extreme care of it.