Poor customer service

I booked a car from budget Cape town airport, on 27/10/25, when returning I was alerted by the gentleman receiving the car that there was a small scratch on the wheel cap(which I wasn't aware of) 2 days later I received an SMS notification that I will be billed R1160.87 excl vat, I have emailed and called them asking how they got to this amount but to this date I haven't received any feedback