Cell C contract not honoured then they want phone back

I got 2 cellphone contracts from a Cell C shop in East Rand mall, about a week apart for my kids. The phones are both Samsung J4+ on pinnacle 500mb top-up for R199 pm. The advert stated I would also get the following extras each: - Powerbank - Cover - Screen guard The 1st phone I got on the 20th of April and the sim card was activated on the 1st of May 2019, loaded with air time, data, smses and whats app bundle as per agreement. For the 2nd phone, I signed the contract on the 23/04/2019. I have copies of both contracts. The sim card was not activated. When I contacted them to ask why the sim card was not activated,they said the consultant forgot to submit my papers to Head office, they demanded I bring the 2nd phone back as they didn’t have a contract for it. I asked the consultant for this in writing and didn’t get anything. Now I am being harassed by calls from an assistant manager saying the phone must be returned. Unfortunately there is no truth to what is really happening as the stories change, from 'keep the phone and wait for the up coming specials' to 'return the phone'. So I am stuck with - a sim card that cannot be activated - 1 powerbank - No phone covers for both phones - No screen guards for both phones I have a copy of the contracts and the call center needs the confirmation from the store before they can activate the sim card. It is just unfair that they cannot resolve this issue to my satisfaction.