Bt audio

Hi ever so I recently got a Mazda 2. Bt audio was working fine and normal, my 2 yr old child was in the drivers seat while we were waiting for food and now this pops up on the display and my music doesn't automatically play when I start the car and my controls to skip songs no longer work. So instead of showing BT: track 0-1 it just says BT AUDIO. please help !!