Wrong Device received, Pathetic Customer Service

Yesterday 19/08/2021 I phoned 082145 to do an upgrade on one of my contracts, the consultant told me what phones were available I then chose the Huawei Mate P40, after she had read met the terms & conditions I changed my mind and asked for the iPhone 12 Pro, she advised that it is no problem. She then told me that they have blue and grey I must chooses a color, I chose grey. This morning Cell C delivered me the incorrect device, I immediately phoned them and what a struggle every consultant I spoke with told me another story. Now it will take 7 to 14 working days to collect a device I did not want and when will I received my iPhone as requested? I have more than 1 contract with Cell C and my business as well. Really feel like cancelling them all due to this pathetic service.