Theres something wrong there are you sure you are using the correct buttons? MY15 car does this.
If you phone is connected,
On the 3 buttons to the left of the airbag cover under the left steering wheel spoke, the button with the green telephone on it should bring up your recent calls list.
If you keep the button pressed in it will bring up your whole telephone book stored in the phone.
Now on the small cluster of buttons on the left, you need to use the - (down) button to scroll to your contact that you want to call.If you go past the contact use the + (up) button.
Perhaps you have been using the > (forward) button? that will change the radio station or flick on to the next track of your media.
When your chosen contact is high lighted on the screen you have to push the green telephone button again. Red one to end the call.