Leave conversation option unavailable
I was sent a group message from a unknown number and there are 10 other strangers in the message. I want to leave it but I can't. I have a new iPhone 6 so it has iOS 8 but the leave conversation option isn't there? Some people have the option greyed out but the button isn't there at all..
Why can't I leave and how can I fix this?
Is anyone else having this problem?
Thanks
iPhone 6, iOS 8