Samsung 55 uhd that I paid more than R7000

If they was an option for 0 stars that's exactly what I would put for Samsung, only If I check here before purchasing a tv, I wouldn't be in this situation because I see complaints that are similar to this, so I purchased a TV that was on sale at Incredible connections Fourways on the first of June, I then went out of town up until end of August, that's when I opened the TV and put it on the wall right away a week ago 2 lines started appearing on the TV, im highly unhappy y anry disappointed and very unhappy with Samsung, i have been a loyal customer to them, almost every electronic i own is Samsung branded but after my experience with the TV im even thinking of changing everything, this tv is under warranty I don't understand why do I have to be stuck without a tv, for a week or more why can't Samsung just refund me, or give me a new TV, now my kids are going crazy because I have no other tv, I'm so so disappointed, please Samsung refund me or talk to the store because definitely you not giving us the service we are paying for