5 reference numbers and no help yet. Call centre no help

I was phoned by nedbank on the 25th of June to upgrade my gold credit card to a platinum card. I was told it would show on the banking app after the call. This never happend. I was also told the New card wil take 3-5 working days, it been 2 weeks now. I have even reported this as ***** after 5 different reference numbers. I still have not even received a call from nedbank. This is one of the main reasons I closed my acc with nedbank 4 years ago