Brand new phone screen not responding after two week...

I bought a new hauwei Y5 on the on the 27th of Oct 2018. Bought brand new at Cna maponya mall. Apparently they give me 7 days to return the phone for a new one and if the 7 days passes by my phone goes for repairs. So I'm thinking now will stay without a phone for 7 to 15 days. My phone is only two weeks old and the screen is giving me a problems. The screen not responding at all. Why does a client have to go through so much after buying a brand new phone that is two weeks old and not exchange for a new one. But they have to inconvenience me for 7 to 15 days. What type of phones does HUAWEI produce if it only take two weeks and the screen stops working. Worse they can't exchange it they want it to go for repairs after paying cash for the phone. The service is really not acceptable and so disappointed in the brand