Manager Bad Attitude to Customer Complaint

I purchased an iPhone screen cover (1 Dec) and it has cracked. I requested the store assistant to replace or refund me for this and he consulted the manager (Albertino) who refused my request instead saying that I need to take this up with the product supplier. I told Albertino that my business is with Vodacom and not the supplier and referred him to the Consumer Protection Act that he is obliged, as a representative of Vodacom to adhere to the principles of the CPA and act accordingly. Albertino underlying attitude was really bad and there was no feeling that he had any intention of providing me with the customer service I would expect from a company such as Vodacom. He spoke to his assistant in front of me in Portuguese and when I asked him to speak in english so that I could understand what he was saying he ignored me. When I asked him if he knew of the CPA he said that as a manager he needs to understand it - I suggested to him that he does not understand it at all but this did not interest him. While the cost of the cover is only R200 which I can forget and go to MTN, I strongly advise Vodacom to review how they appoint managers to their stores - this is not a success story