Screen lines

İ hava p30 lite 2020 edition phone .. suddenly on screen there was Lines started with one then increased also affected badly to control.. i thought maybe it was because of screen protector and i removed it but still was same and unfortunately screen cracked my small son till(it is far only one in kzn and cant go always) i go to durban Huawei center .. İ spoke to 3 person 2 of them said if there was no crack we could fix it i tell them everything but they said they cant do anything and finaly store manager came and told me even Lines that occures it was user fault they cant fix it i have to pay and Price was also ridiciolus .. But i done a bit research and this Lines are not user fault .. in Turkey Huawei has fixed this .. but end of the story i drove all way for nothing no help...