Cell C upgrade very disappointing

I am truly angry with the service, upgrade the one of my contract last year and requested to close one contract as I had two. I was told that I can close the other one in Jan. That's when hell started. I spoke to Caleb in the upgrade department who was very helpful until he made a mistake . He upgraded the wrong sim and he says I took the wrong hand set. He did not tell me to take a certain handset but he said it will be fix when my contract expired. I called him on the 21 st to tell him I want to close the other number. I told him to correct the mistake which he said he did. He offered me 5g data contract on the number I want to close which is ********** 809 . I was happy with this until I found out the is another mistake . The numbers are swapped , I took the first contract from my mother who stays very far from me. Now I getting her calls and I am getting hers. This number I have I use for my business. Now with all this mix up I am losing. Then I am sending numerous emails to Caleb and he does not respond. I called him today and he was very rude as he spoke to me with a irritation tone. He told me he did everything he could the is nothing he can do. My mother who is pensioner had to go to store in Jabulani mall and was told she can not do a sim swap on that number we need to cut the sim I had. Why must I go through all this pain , why must I suffer and I don't default on this account and be treated like this. I asked to speak to manager or team leader told they all buys. How I feel so small , then why don't the cancel the other contract because clearly my business is not important . Cancel the new one because I did not even get that gig. Now I must sort cell staff mistakes. I am truly disappointed after so long I ve being with cell c . I even sent an email to the cell complain not respond till now.