Found at Kultepe, Turkey, this nearly 4,000-year-old sealed letter was decoded using CT scans recently. Turns out, it was a woman complaining that someone refused to repay a debt.
Just like when people type "Turkiye" instead of "Türkiye" because they don't have ü on their keyboards, he probably typed it out by using u.
As a side note, anyone who is so hell bent on trying to respect the dictator and not the country, if you are writing it in all caps, it becomes "TÜRKİYE".
On top of that, hearing people say "turki-yey" is worse than hearing people say "Turkey" since one is an exonym, and the other is a mangled endonym.