traffic announcement

I have recently bought this car and i cant for the life of me turn off the traffic announcements. I have turned the option to on and off and they still come on. Does anyone have any ideas? Is there a master reset button for the audio?

I have just discovered that I cannot operate the radio's TA button and switch off the radio to listen to spoken instructions while using the TomTom sat nav. My previous car, a Toyota Avensis allowed me to use the sat nav and TA information cut in when it was broadcast. As I do not want to have...