Worst service of Supersonic. Please reply if you have been in my situation to build a solid complaint for legal and Ombudsman purposes

I have been billed amounts of money that none of the people in Supersonic watsaap can explain apart from promising me that I will get my refund until today nothing has happened. Even if you call them they hardly answer their calls not sure if they care or not about their clients. In February they billed me my monthly for HOME lte and fibre commissioning fee and still R600.00 was billed from me with the call center claiming they made a mistake as they thought changing from lte to fibre was too soon for me and I don't meet minimum subscription months. I was able to prove to them that I have been with Supersonic for 2 years that when they admitted the mistake. Until today I never received my refund. This month I have been billed R 250.00 monthly fee and R 700.00 without a reference to it. Not sure if their employee is running a **** scheme or what. I would like to take this matter to Ombudsman or have my wife to represent me in taking this matter to court because this might be happening to many people who doesn't have enough money to pay advocates to fight this kind of behavior. If there is employee **** scheme within Supersonic maybe we can have lot of people coming out with the same complaints. All we want as consumers is transparency as well as fairness in billing.