Dissatisfied client

I bought a Samsung A30s on the 25/03/2020 at an Edgars store bin Protea Glen and on the 16/04/2020 at around 16:30 the phone just become black I can only receive calls. And even the phone rings the screen just remains black. I am puzzled why a brand new phone would just do that, it has never fell and I don't play candy crush that much on that phone. I am truly disappointed with the phone.