Pathetic service

I called in on the 10th of December 2021 to downgrade my subscription and I was told to pay R290 ,this month I got an sms that says I owe R800 I called in to find out why am i owing that amount. I was told I have arrears because I upgraded my subscription which I never did ,the consultant who was helping me said he was asking the billing department ,he came back saying I must pay R321 for us to be reconnected again ,which I did ,I called in to reconnect and I was told I'm owing ,I want to know why do I owe for the mistakes that was made by their rude consultants? Im ****ed off with multichoice pathetic service