Worst Client Service

Bought an IPhone 15 Pro Max Cresta Istore, within a week it started overheating. I took it back and it was replaced, however, they removed my screen protector. When device was returned, the month old screen protector was removed and they did not replace it. Upon request, Maxoxo the store manager was very unhelpful and said if I feel I am not getting any help, I can feel free to email the customer service !!!! I am buffled to say the least!