Pathetic service

I bought a new phone at Pep cell kempton park on the 5th June for my child. We the realised over the weekend that the speaker multinations, at time on calls we .can't hear each other and audio recording has some cracking sound. My aunt took it back on Monday the 8th but she forgot to diactivate de security pattern, an agreement was made with Phindi that the owners of the phone will bring it back and she must assist. Indeed on the 10th the kids took it back but they were given hell. I then asked my sister to take it back on Friday the 12th and she was told that they will not exchange the phone but take it for repairs. This is an out of box failure I'm not sure of the reason for the repair. If the phone has no fault it should not even be taken for repairs. I can't get time off during the week and on Saturday. And the store doesn't open on Sunday.

I please ask for these stores to train their employees properly. Can I please have my new working phone or my money back