Worst service in my entire life

Hi Im so upset after being a loyal customer that supports Samsung by purchasing most of their range of products. They have given me bad service with my Samsung S6 which has been booked in by their branch in Somerset West in January already I am currently paying for an active contract which I am unable to use. I am phoning and they keep on saying they will contact me back their number is a special number which means I am still paying on my other contract for calls to them their staff even stated I should call back as they might forget. I have been taking off work to go follow up but still nothing since January they have been waiting for parts I feel like throwing all Samsung products out my house as how can a customer deal with this bad service their branch in Somerset West are bad as everytime I deal with someone else but just no feedback. I want to make a case at the consumer protection and has asked for them to email me a statement as to what is wrong and what they shall be doing and sending back my phone even unrepaired but no nothing. THIS IS THE WORST SERVICE EVER THEN MY SERVICE PROVIDER IS ASKING ME 2 DO AN EARLY UPGRADE TO THE S9 HELL NO SAMSUNG HAS LOST MY CONFIDENCE. OTHER SUPPLIERS BY NOW WOULD HAVE EVEN SEND A REFURBISHED PHONE BUT NOT SAMSUNG. I HAVE A LAPTOP, SMART TV, MICROWAVE, TABLET, SMART WATCH, 2 TABLETS AND A S4 ZOOM BUT I FEEL LIKE I AM NEVER GOING TO SUPPORT SAMSUNG AGAIN.