Grease a 9-inch springform pan, line with parchment paper, and preheat oven to 425°F
Mix graham cracker crumbs, sugar, and melted butter then press into the pan
Beat cream cheese until fluffy and mix in sugar, flour, vanilla, sour cream, and whipping cream
Fold in eggs one at a time by hand
Pour half the cheesecake batter into the crust and bake in a water bath for 15 minutes
Cook peaches with butter and sugars until softened, then thicken with cornstarch slurry
Layer one-third of peaches over cheesecake and cover with remaining batter
Bake 45 minutes
Mix cake mix, butter, cinnamon, and cream to form cobbler crumbles
Top cheesecake with peaches and crumble and bake 15 minutes more
Cool in turned-off oven for 60 minutes
Refrigerate 3 to 4 hours before serving with remaining peaches