Samsung Repairs

Good day I am very disappointed with the overall service from Samsung SA I sent my phone in t ADH about a month and a half ago for screen and microphone when I got my phone back the screen was fine but my microphone was not sorted out after that my phone started getting very hot and it was freezing and moving slow when I called ADH they told me they will collect my phone on the 29/09/2015 on the 30/09/2015 I called them and asked why wasn't it collected they told me that a note 4 only has 1 claim and I told them that my phone is worse ever since I got it back from them they refused to help I then booked my phone in at Brooklyn mall on 08/10/2015 and I sent Samsung SA a email to complain on the 09/10/2015 they told me they will respond within 48 hours today is Wednesday 14/10/2015 and I still didn't hear anything from them, I am very upset with how I have been treated as I am without a phone and no feedback, I wish to change all my Samsung products to Apple after being treated like this......