DISGUSTED!!! LOOSING MONEY!!!

I have a huge problem with Samsung and its services and product of the S5 mini. I have brought this phone in Nov 2014 and it still has a warranty of 2 years!! I had to go to Samsung customer care in canal walk cape town twice where they have repaired the faulty screen once and 2 weeks after that the same problem accrued where the screen just went black and you can't see a thing!! I went back it was the same issue and they repaired it again their excuses was the phone it does that? I moved to jhb and the phone started to delete icons itself from my home screen,the screen does not want to slide unlock, the phone does not want to type,the phone gets hot and the battery lasts for 3 hours,the phone does not want to end calls and no apps wants to work. my phone is my work,they had to keep the phone for two weeks. I needed a curtesy phone seeing that my mobile is my bread and money. 4 times to customer care Samsung and only got bad service a **** phone and no business or making money while my phone does not work! This is totally unacceptable I have lost almost 15 clients due to not having a phone. someone next is the newspapers!