First Car Rental not so trustworthy.

After making use of First Car Rental services for the first time in March 2018 it was quite a nice experience. I paid a deposit of R1500.00 from my Credit Card and upon returning the car the outstanding amount less the filling of the fuel tank was paid back into my account as per the policy agreement. Exactly a month later an amount of R210.00 was deducted from my Credit Card without my authorization by First Car Rental Kempton Park. I send 2 e-mails to try to get an explanation but to no avail, thus assuming that someone has long fingers at First Car Hire and someone is covering up for it. What is scary is that nothing is stopping them from deducting 10 times that amount in the next ten months. People beware who you trust with your Credit Card.