BILLING AND REFUND

my insurance hired a car for me while my car went for repairs 19 Sep 22 the courtesy vehicle was delivered to me and after 31 days extended as my vehicle was in repair. I then requested a one-day extension which I was told I had to pay R232 and upon processing the extension the consultant overcharged me and when I discovered that he made a mistake he apologized and telephonically said he was going to rectify. To date I am not refunded instead for a day I am over charged and 1 day charge is more that 60 days. I Called and was told it will be rectified to date nothing is done. The consultant said they will call and rectify but nothing to date is resolved.