Ackermans Woodmead - Premio Phone not charging

I bought a phone in the store, now the same phone doesn't charge. I went into the store yesterday, there was loadshedding, I understood and left. Today I go into the store and tell the staff that the phone doesn't charge, I am told that I need to buy a generic charger head because the original they do not have. My question is, how do I buy a phone that charges only for 2 days and at my expense I am expected to but another charger brand. Khathu and her colleagues attitude towards the situation at Ackermans Woodmead made it worse. I cannot buy a phone then few days later I am expected to spend more on the same phone. I have sent a complaint and have since not been attended to. I want to know if this is fair business trade where all the costs must be put onto a customer for simply choosing to buy at your store. I don't even want the phone anymore