Very disappointing service from Samsung.

Good day, I recently took my Samsung galaxy s6.edge smartphone in to the Samsung Service centre at the Century City branch. The phone was overheating and the screen was cracked. I waited for two weeks without an update, this was very upsetting. I had to call them and at times it was nearly impossible to get through to them. I was then informed that the parts for the phone is delayed so we needed to wait one more week and then the phone would be delivered to us. Two week after that the phone was still not delivered. They told us to come collect it next Friday, when we got to the Samsung Service centre the phone was not ready and they told us to wait an hour. We asked why the phone was not working and they said it needs to be charged. We went home only to find out the phone wouldn't switch on. Then they called to say we must come back so they can update the software. The incompetence that I received from them was unimaginable. Now imagine my frustration, all the petrol and time wasted to find out that my phone is still not working. It's been a month and it still overheats and switches off daily. The back cover was not opened correctly and the glass is coming lose. My device is still not working properly. I have emailed Samsung several times and still no response. I can't believe I got such ****py service from Samsung. My next phone will be an IPhone.