Customer service very bad and call center consultants very low experience

In the month of January 2020 I’ve called Multichoice 6 times already to make my annual payment and every time I call I speak to a different person who promises to call me back and fix the error on their system regarding my account billing & I’ve even spoken to the manager but till today I have 4 different amounts that’s I have to pay and no one knows what to do.