Fantasy free data a nightmare

I bought a Cell C Fantasy cellphone at Ackermans in West Street Durban on 6 February. The phone was advertised with free cover and 6G data (*1G×6months). I'm still waiting for my free data. Ackermans is telling me they not sure how the promotion works cause Cell C doesnt communicate it to them. They told me to phone Cell C to quiery about my data promised. Cell C tells me I need to contact the store I bought the phone from. I've wasted airtime and travel expenses on numerous occasions and still nothing is being done. The manager promised to call me back but never did. False advertising promising data and not delivering, bad service selling a product when they have no knowledge how it works and not bothering to solve the problem. They just passing the buck. Worst service ever!