I use the same display. It was a nightmare to make it work via I2C but finally a found this post: Volumio + 2.42" OLED + PSU in one aluminium case - #20 by Zhapox
1 install plugin and test is with a smaller I2C screen if it works:
2 modify resistors on 2.42" screen
3 install capacitor and resistor to RES pin
it will work