Extremely Unhappy with Samsung UHD Smart TV

Hi, I have bought Samsung 55" UHD J version series 6 Smart TV from Makro SA about in December 2015 and I thought it would be really nice to spend nice time with this TV. But I am really facing lots and lots of issues with this TV from Day 1. 1. I tried to connect my 2TB hard drive and initially it connected fine and later after watching normal TV channels and tried to reconnect my Hard drive. I was Getting "No Content found" error when connected to my 2TB harddrive and stored an Unknown file in the Hard drive. I thought its the problem with Hard drive and i tried with 5 different harddrives and doing the same thing for all of them. This is happening every single day. 2. Youtube app is not working from Day 1 and I tried to reinstall the app and i tried for online help. Nothing helped. I am using my webbrowser to watch youtube. 3. While watching the any movie from USB drive or hard drive, It automatically switchoff the TV in the middle of the movie and switches on back. I used to have Samsung 32 inches LED TV which is 100 times better than this TV and used for 4 years and never faced any issues. I tried to contact the live chat support and waited for more than 45min and no agent contacted me. I left my email id details and sent the description as well but no response. I spent extra money on Samsung TV when LG UHD 55" is coming cheaper than this and my friend bought LG TV and he is not getting any issues with his TV. I feel like I made a biggest mistake spending 14K rands. I thought samsung is best in TV's but my opinion changed now or Did I receive one of those faulty piece. I dnt know but i am not happy. It would be much appreciated if you could please help me with this issue. Thanks Jeevan ***