4 Times to Samsung just to get screen fixed

I went to Samsung William Nicol as that is the only store where I an fix my screen in my area. a consultant there told me they have no S6 edge screens so I need to come back in a couple weeks. I went back in a couple weeks where I was told I have to order a screen. that screen came in a couple weeks. I went back again to take my phone in only to be told there is only 1 service consultant and the phone will take longer than I day which I cant afford as I don't have another phone to use. I decided to go back again which I did in a few weeks (it was December and we were away). I went back today and again there is only 1 service consultant again there today as the other one was writing her learners liscence. the manager said she would personally fix the screen. she told me to come back at 3pm which I did, only to be told the new screen that came was faulty as there were lines on it so I had to wait again for a new screen which will be there on Monday. Mondays visit will be my 5th visit to the store, I really hope I don't go there again to be told another story! I think this is unacceptable!