Purchasing the samsung A3 phone was not agood idea

I bought samsung A3 galaxy phone at one of the samsung stores in menlyn it has been a nightmare purchasing that phone. I have not enjoyed using that phone at all. Everyone week the phone is having problems, and this is a phone that is not even two month old. I thought buying the phone in a samsung store was a good idea, for real it wasn't. Since Jan, 2016 have been having lots of stress concerning that phone. Immediately I purchased the phone I stated experiencing problems, at one point the buttons were not working, then I stated getting black screens. When I traveled to to Capetown the phone one day the phone just died black screen again. Retained it to the store they were insisting the the phone dropped down which didn't. Tightened something on the phone it worked for 1 week after which it stated having black screen again, died again had to repaire it since they do not warranty mechanical damage with $200. After which the phone only worked for 3 days then stated experiencing black screen again took it for checking up I was being told i need to repair the lcd again that it has burnt again. Another $200. Really is this fair. This phone has not even taken 2 months