Factory Fault phone Nokia 3

believe that I am not being treated fairly by Vodacom and Nokia. I feel that my rights as a customer is being undermined. I haven’t used these phone since I bought it on the 15th of December 2017. It has been in and out of repair centre. How do you fix a phone with a factory fault? It’s more than months now, trying to fix a new phone. A phone was bought at Edgars Brooklyn and Now is at Vodacare Centre