Samsung galaxy grand neo duos gt-i9060

My husband purchased this phone for me whilst on holidays in Vanuatu (we live in Australia) and when I got home I started receiving CB Messages and have no idea what they are - can't open any - cannot find where I can turn it off. Many say go into message and then settings by pushing the left hand button and setting should come up, but on mine it does not come up. I am desperate as nobody can help me - can anyone out there help me? Thanks, Anna