Debicheck accepted with proof - Cell C system shows not accepted??

On 28 November 2025 I've phoned Cell C to sign up for an Innovate 2 sim-only contract as part of their Black Friday deals. I've accepted the DebiCheck mandate on my FNB App and I've also received a confirmation Whatsapp from Cell C that my DebiCheck was accepted. On Thursday, 4 December I still haven't received my sim card, and then contacted Cell C and then contacted Cell C to enquire about the delay. After routings through several departments, I was eventually put through to the consultant who did the contract with me on 28 November. When I've asked him why my sim card wasn't delivered, he informed me the system shows I haven't accepted the Debicheck mandate on 28 November. I then told him that I have accepted it on my FNB banking App and also received a confirmation whatsapp from Cell C that it has been accepted. I then emailed him proof that I had accepted it on 28 November 1) A screenshot from my FNB App showing that it has been approved as well as 2) A screenshot from the confirmation whatsapp from Cell C that the Debicheck mandate was accepted. He informed me that he will escalate the matter, but I may not qualify now for the Black Friday special. I was very upset, because I have entered into a contract on 28 November 2025 and I have the 2 screenshots as proof that I've accepted the Debicheck. Since Thursday, 4 December I haven't received feedback on the matter. I've emailed the same consultant (***) on 8 December to enquire whether there is any feedback on the matter. It is now 9 December (6 pm) and I haven't received any communication from Cell C, nor the consultant. This clearly shows that Cell C is not prioritizing my issue. I am a new client of Cell C, and I feel Cell C could have resolved this matter sooner. It is now 11 days after I've entered into the contract, and I still havent received my sim card, nor any communication?