Damaged Goods - Unacceptable service

I purchased 4 mobile devices on the 22/12/2017 at PEPCELL Maponya Mall. After 2/3 days t one of the devices was not working properly. However because of the holidays in between during the festive season we had left for vacation and I could only manage to return the device on the 28/12/2017 and I explained that on the 27/12/2017 I was unable to return the device due to having booked off sick. Upon returning the device I was told of all excuses and eventually told that I will be refunded after the assessment has been conducted and the report shows that the phone was not tempered with. I then agreed on the device to be evaluated. I was then called that the device has been checked and confirms non interference from my side however they did a software upgrade and the device in good working condition and should be collected. I refuse to accept the damaged or improper condition of the mobile sold in to me as it is clear that the mobile device was indeed faulty upon sale. I need my full refund to be given to me as this contravenes my consumer rights as the mobile was portrait as a brand new phone and will work with hinders 1. The mobile device was cutting calls 2. It couldn’t connect to the network Their excuse of not refunding me is they do not wasn’t to incur the loss as the mobile was returned on the 7th day regardless of taking into account the holidays and the off sick where proof could be provided.

Regards Tebogo Masehla ********** ********** 148658 **********