Wrong advertising - Consumer Complaint for PEP STORES

I bought a phone at pep today 2 September 2020.The name of the phone is Tecno pop z mini on the display it is written that it is a vodacom locked sim and after activating you get 3gig data for 12 months there is no starting and ending of promotion on display.Now they say you are the one to be blamed it is not their problem cause i bought the phone because i saw that promotion please see to my compain the no for the phone is 0792194315 I'm not happy at all because what ìs displayed is not happening for me i always think Vodacom is the trusted company