VIP Missions are only accessible if your VIP status is active. The ‘Refresh VIP Mission’ item is available in the Store for 1000 Gold. The ‘Collect All’ option becomes available once you reach VIP level 15 and can be used if your VIP status is active.
Starting with VIP level 7, Daily Missions are auto-completed, but only when your VIP status is active. Alliance Missions will autocomplete starting with level 8 and VIP Missions starting with level 15. You can check your current VIP level as well as all its benefits by tapping on the VIP icon located next to the player avatar.
You can read more about the VIP Status benefits here.