Unhappy customer

I app**** to have their services installed in my house in Bloemfontein this was sometimes in February, around March I got an sms to say the system was active but they never came to do installations and supply me with router. Thereafter they started billing me for service I don't have till to date. I have been calling and say the same story and that they must stop deducting my account for services I don't have but they just keep saying we will investigate and come back do me but I don't get do hear back from them. I have send them emails when I have canceled the service on line as I was hoping it will get their attention ,all they did was to send me cancelation fee statement which they deducted but I don't understand how they bill me as I don't have their installation and router and they are not responding to my queries. This month after cancelation they still billed me when I called again a lady said she is escalating the matter but no one comes back to me to resolve this. Is a pity I can't even reverse this transactions from the FNB account now due to covid - 19 regulations. All I am hoping for is for MWEB to look into their records and refund my money for the last three months