Poor service/bad attitude

On the 15/7/14 went to get my contract fone,iPhone S5,8months down the line it had a faulty screen ,I could not use the fone took it to the shop,they told me repairs takes 2-3weeks,this is the 4th week now,they called this morning they said my fone was ready,I was given my fone,went to my car,when I switched on the fone,the screen was still faulty,went back to the shop, I told her the fone is still faulty,she told me to look at the box it's written not repair,she didn't have the decency to tell me that the first time,the was a paper written but could not understand how they said it's my faulty,I love my fone it's in a very good condition,it doesn't have any major stretches,now am stuck with a faulty fone while am paying R489 a month for it,I need your assistance help peter urgently ,waiting in anticipation<br>