Stuck on 'Syncing Data for Forza Horizon 2'

As above, i load the game up to the ‘Press A’ screen but after i press A it comes up saying Syncing data with a little white line going across, been like it for about 15 mins now, xbox support are useless so i don’t know what i can do… anyone have any suggestions?

Power cycle your Xbox.

Hold down power button until it completely shuts off, then unplug it for a few minutes.