Sat nav not working

[Melallen11]

Hello, I was wondering if anyone could help
I brought a 2013 208 recently and the sat nav was working and recently all of a sudden it’s stopped. I currently thinks I’m driving in the sea… it says I can find satellites however is saying 0 is in use.
does anyone know how to fix this so I can get the navigation working again?
Thanks In advance

 

[Charlie1875]

If you hold both buttons in for about 20-30secs I think it resets the screen,