Horrible experience at Apple Store. Staff returned...

Horrible experience at Apple Store. Staff returned my device 40 minutes late, had not completed the requested repairs, and somehow had bricked my device. I went in for a screen repair with a fully functioning phone. They stated that my screen was aftermarket and caused a problem (false, we purchased the phone brand new from an apple store and have never replaced the screen) and that multiple new screens were not working properly (also false: they returned the phone with the cracked screen in the exact form it was when I showed up at the store, I don't believe they could put small pieces of glass in exactly the same location). They changed their story repeatedly, and also never completed a requested battery replacement. When they handed the phone back to me, it wouldn't turn on and they told me it just needed to re-charge. I went home and charged it for hours, and it won't turn on! They completely bricked my device.