I have only just started using idoceo. When I went to open the app this morning it froze then the app icon went white and my screen went white. Eventually I was able to click out of it but the app was still white. I turned my iPad of then on again and the app changed to some random app I have never heard of or downloaded. My idoceo app is now missing and even when I go into the App Store it doesn’t give me the option to open or update only to download from iCloud. I have since (after my data and app has disappeared) found out I needed to internally manually back up. I’m desperate. Is there another way to restore all my class roll data, rubrics, photos and grades etc?

Hello Leith,
It looks like your iPad is MDM managed by your school. If iDoceo has been erased remotely by your IT dept. you won't be able to restore your data unless you did that backup.

It shouldn’t be MDM managed by my school Bert as it is my own personal device and the only link it shares with school is that I use the schools wifi when at work.
Is there a way to retrieve my data? I’m really stressing that I have lost everything

I'm afraid not. Data is stored locally in the iPad and nowhere else.
You should try installing iDoceo from the App store