Cell C fibre

I’ve been using Cell C for my home fibre for the last 5 years. Last year I suddenly had no internet. Normally when this happens, I notify support to fix the problem. However, after back and forth for a few days and after openserve stated the Cell C is in arrears, I stopped their services and got connected via Afrihost, quickly and seamlessly. At the end of November 2023, I again received a full bill from Cell C. I thought that it would be at least for a half month. I then reversed the stop order. Cell C contacted me and said that there was supposed to be a month notice and they must charge me for both November and December. In December the amount when off double. I then thought it was sorted. However, they charged me again in January 2024. I reversed the debit order for January, and then in February the debit order was doubled. Would it at all be possible to get rid of theses people?