Wifi calling?

[knitchy]

Honestly I have no Idea how to turn this on.
I confirmed with my carrier (vodafone)yesterday that I have it available, they had to switch it on themselves their end.

Firstly I don't see it in this settings menu, anywhere.
Secondly I can find it if I do a search in settings. However, trying to activate it is another matter.
This is the message I get when I try to activate it:
"When Wi-Fi calling is on, your phone can route calls via Wi-Fi networks or your operator's network, depending on your preference and which signal is stronger. Before turning on this feature, check with your operator regarding fees d other details."
There are no buttons or any way (that I can see) to progress to another screen.

Can anyone work this out? Slightly losing my mind over this as I can normally find the answer, be it through my own findings or through my friend google.

 

[knitchy]

Okay, so after two more phone calls to vodafone yesterday I have been told that the P9 is not yet a compatible phone with them for wifi calling, furthermore because I purchased it from carphonewarehouse, it will probably never be compatible with them, which is absolute bull****.

Are there any tricks I can use to activate this myself? Quite desperate for this to work as I literally have no signal anywhere in my house (absolutely fine once I step out the door mind). This goes for any network operator, I'm sure my house is lined with lead.