I'm having the same issue and the helpdesk claim it to be an "isolated incident" which it clearly isn't given all the help topics on this.
I'm stuck in an endless loop with them where they keep suggesting retaking the selfie with a variation of:
"Change the lighting"
"Shave stubble off"
"Change profile pic to match selfie"
"Change device"
"Wait 24 hours"
"Clear cache / browsing history and retake"
"Restart device and try again"
This really needs looking at as it's not fit-for-purpose at the minute.