@cakepanda - Not sure why a hard reset didn’t work as it should wipe everything… but
what you could try and do is reinstall the recovery file by flashing it to your phone and running it in recovery mode HOWEVER, you will need the right recovery file and it hasn’t been posted up on the FP website yet.
The best way to proceed may be to raise a support ticket by going here: https://fairphone.zendesk.com/hc/en-us. But I’ll also ask Joe (Community Manager) whether it is possible to get the right recovery file for the FP1U uploaded so that you can do this.