Blackberry PRIV blocked by message: "Unfortunately, Google Play services has stopped"

When I try to use my PRIV this message appears, asking me to respond "Report" or "OK". In either case the message just returns. I can see, but cannot access, the settings or other menu items/apps on the device, so I cannot use force close or delete and reinstall the app. Can anyone please advise how I can get out of this loop as the device is unusable now?
Many thanks

It's an app issue.. you can spend the time trying to figure out which app is the root of it.... or you can skip it all, just do a factory reset and start fresh.

Thanks for the quick and helpful response - I'll try the factory reset.

Thanks again - I've tried to do a factory reset using the Settings menu, but the screen message about Google Play services keeps coming up and overriding what I am trying to key in, so I can't complete the process. Is there a physical way (e.g. using the volume or power buttons, removing and replacing the battery, etc.) of forcing a factory reset please?

Originally Posted by bobstephenson60

Thanks again - I've tried to do a factory reset using the Settings menu, but the screen message about Google Play services keeps coming up and overriding what I am trying to key in, so I can't complete the process. Is there a physical way (e.g. using the volume or power buttons, removing and replacing the battery, etc.) of forcing a factory reset please?

Can try here - https://www.google.com/android/find?u=0