iStore ***** & Consumer Abuse

Since the 02nd November 2019 the iStore in Sandton has given me two supposedly new replacement devices for an iPhone XS I bought in November 2018- and all these replacement devices have proven to be faulty. on the 07th March 2020 I returned a device they gave me on the 06th December 2019 (only three months ago) because it just switched off without any physical damage. Their Core Service team came back saying the device isn't faulty even though their store manager also witnessed the faults and decided to book the device in for repairs. Apple lies to us when they say their replacement devices are new because the devices don't even come in a sealed box as when you buy a new phone. I've been diligently paying for a phone that has been in repairs all the time, and even now I've been without a phone for more than 6n days (even though they say it takes 5-6 days to replace/repair devices).