Unhappy customer

On the 22nd of November I called mweb to dispute an amount of which I told them that I wasn't going to pay. I was told that someone would get in contact with me to resolve the issue. I then called them on the 25th of November to find out why nobody has got in contact with me and the technician told me that he marked it has urgent on the system. The service provider has not called me to date yet they have debited me for an amount of R2723.00 on the 01st of December 2021 even though I had paid my monthly installment of R499.00 on the 30th of November 2021 I just want my money back