I have two Sonos One speakers which are grouped together to make a speaker system called ‘Kitchen’. The Sonos account in the app was set up using my sisters email address and Spotify account. I then added my Spotify under her Sonos account so that I was able to play my playlists from my phone. Now the problem is, I’ve since tried to remove my Spotify account and it just doesn’t seem to be working. So far I have:

• deleted my Spotify from the Sonos app so that it is no longer visible there

• deleted the Sonos app

• logged out of all devices that my Spotify is logged into and changed the password

•I then clicked “forget the device” for ‘Kitchen’ in the Spotify app
 

After all this when someone says “Alexa play Iron Maiden” it automatically plays from my Spotify account and the ‘Kitchen’ device pops back up on my Spotify!! I am at my wits end and I don’t know what else I can do to remove my device except factory resetting the Sonos which is what I think I’ll have to do. It’s a nightmare when I’m out of the house listening to music in the car and all of a sudden it cuts off because someone is using the Sonos. 
 

Any advice would be really appreciated :)