Appalling Service!!!

I'm struggling to put my frustration and disappointment in words! My contract is due to expire in July. I did an online upgrade on 26 May 2023 and I the consultant assured me that they have the colour that I explicitly advised that I want. Delivery was made on 30 May 2023. Immediately after the courier left, I opened the device to find it in the color that I did not order. I called Cell C straight away and asked them to have the device collected. A reference number was given for the booking. On the 8th of June I followed up since the device was still not collected. To my shock, I get told that collection has been cancelled as Cell C's terms & conditions stipulates that "the colour is not always guaranteed". My biggest problem with this is that, no one called or at least sent a message to inform me that the case has been closed. Moving on, I then advised the consultant that their terms & conditions also say that the device can be returned within 7 business days if the client is not happy for whatever reason. So I told them I don't like the Device and asked that they book it for collection. Again a reference number is given for the booking on the 8th of June. I followed up on the 14th of June. AGAIN, the consultant tells me the booking has been cancelled by the courier and no reason was given. What a nightmare! Another booking is made on the 14th June. Today 22 June, I follow up. Goodnesss!!! Another excuse, Ma'am the booking has been cancelled by the system, probably because there is no tracking number! Although Lesego was professional and kind, I have lost faith in Cell C Customer Service. Always apologizing but no service. Can someone senior at Cell C intervene and assist?