Unauthorized Funds Debited

I am getting no joy from the customer service when I call them to help me resolve my account query. I called them on the 8th of January and wanted to find out why my monthly contract went to from around R500 per month to R800 per month. I wanted to find out where the extra R300 comes from every month. They said it was for content services and I have no idea what content service they are referring to as I don't get any statements. They said they would send me a statement and gave me a reference number of ***. A few days later I phoned again as I have not been credited for the said content services with ref number 1-***. I was told that my account would be credited with R1110. When I phoned them later they said they would credit my Vodacom account and I said that I wanted my bank account to be credited. February 2021 came and it was still not credited and the the extra R300 per month still remains. I have asked them to get their managers to listen to the phone call recordings to the people I have spoken to. Nobody has come back to me to resolve this. I have been with Vodacom since their inception. I am disgusted with the service and in the mean time I have to pay for this. It is almost as much as my original contract. On the 28th of January when I phoned and tried to get this resolved they refused to give me another reference number. I don't know what to do anymore. I am very despondent and disappointed in the way loyalty gets rewarded.