Difficulty exchanging a phone during 7days policy

I bought a phone at SESHEGO CIRCLE CENTRE that was highly recommended by the 2 ladies working at Jet and to find out that the phone Is not functioning properly according to the way they speak highly of it..I went through their terms and conditions bt they said they cant exchange the phone.the from from where I'm staying its not working properly,its like iv waited R1500 for a phone that's not in gud use for me.the phone is not reaching my demands and I still qualify to their 7days exchange policy.

In the event that your cellphone has a manufacturing fault and thi is identified within the Out of Box Failure Period (Network Specific Conditions will apply), the cellphone can be returned to the original place of purchase for replacement, provided the following conditions are met:

a. The original proof of purchase must be supp**** (i.e. till slip) as well as the terms and conditions contained in the

Iv purchased phones like Huawei, sumsung and Nokia nd iv never experienced any problems bt this Hisense E30 lite it's like a waste of my money.i told them I can either take a different phone since this one is not functioning according to my expectations..m so disappointed seriously..the store manager and her co-worker told me that they cant exchange that phone so I dnt knw wat will b the next step..and the co worker told me that she almost got fired for exchanging phones,nd she and I have to pay for the phone if its gng to b sent out for fixing and on their 7days policy,theres no such..

I dnt want this Hisense phone anymore.