Freezing cellphone and pathetic service

On behalf of my father.. I baught a cellphone on the 3rd of december 2018, within 7days the cell phone started freezing and was not charging properly. We then returned the cellphone on the 10th December, I approached the consultant who told me the phone will have to be sent away and we will have to wait 30days before receiving the phone again. I feel that this is unacceptable as this was a brand new phone and if it is having these kind of problems then it should be replaced with a new one. I don't see why I need to wait for a month! The consultant that was assisting us was never minded when we approached her with the faulty cellphone and when we asked to speak to the manager, we were told that the manager was not there. Consultant: Thembie, larna Branch: The Fix (middestad mall Bellville)