Neither PEP nor Vodacom

I bought a phone at PEP. The information on the display of the specs of the phone are incorrect and misleading. PEP passes the buck to Vodacom and Vodacom to PEP. I already complaint and spoken to Maureen Terblanche area manager of PEP but she keeps on refering to the information they received on the specification of the phones are received from Vodacom. Neither the parties involved do want to take responsibility for my complaint. What is my next step in resolving my problem