Bad service

Booked in my A32 Samsung on the 7th April because of a charging problem. They repaired it and a week later it did the same and also started malfunctioning. Booked it in again on the 22 april. I specifically asked that the device is replaced. My reqeust was ignored and 3 weeks later my phone was sent back with everything inside replaced. When it got back Jhb forgot to sent some of the parts. Again I waited. On the 12 May I went to pick up my phone. Only to see my screen is cracked. When I booked it in. There was nothing wrong with the screen. So its going back to jhb again. I dont want that phone back. I want a new one. I can compliment Mohammed at Savannah mall for he is really trying to assist me. But it seems like the problem lies at Jhb