if you go back authorize seller normally they dont offer repair, they will get you pay for an amount and 1 to 1 exchange you a refurbished ipad air (for damage by own and out of warranty product they normally offer like this)

by the way how bad your ipad air is damaged?

few things need to consider

i believe your ipad air still under warranty but the screen cracked by accident so it suppose not cover

if you get repair outside (whether the screen is original or oem) next time other hardware spoil, can you claim warranty? i not sure so you have to know about this

if you go to apple authorized reseller and pay an amount for one to one exchange, how is the warranty cover?

best is pm Wimpykid first ask him