So to anyone coming across this that has a similar issue, it is possible to enable the smart remote feature. As @JAMES4578 has mentioned the smart remote feature is not supported with this tv probably others too, but using the 'hidden service menu' I've managed to enable the feature
this option may vary depending on model and you can do it at your own risk.
*Please note opening the service menu seems to reset my picture/sound settings so if you have custom settings note them down first just incase*
Open your service menu for me it starts with the tv powered off then - info - settings - mute - power, wait for the tv to power on and the menu to appear.
From here navigate down to FMS and select it, it will again show as a menu on its own select it again.
You should now have a option in the middle of the screen that says Factory App Menu select this and a new drop down menu will appear go down to Option then MRT Option, navigate down to com.samsung/featureconf/bt_profile_bt_smart_control select and change to true.
Now exit all these menus and power cycle the tv a few times, now you should be able to connect your samsung smart using the return and play/pause button as normal 
