They **** to me

I hired a car on the 28th Jan 2022, when I got there to collet it in Cape Town Airport I asked if I can change the driver to be my husband, the guy who was helping me said no its not possible so I said it's fine he can leave it, he then said the only thing he can do is to add him as 2nd driver then I asked if there will be any charges for that, he said there will be NO additional charges, only when they return my money back to my credit card it was R500 short. I called and i was told that it's for adding another driver and I told them that I asked about it before taking the car and the answer was there will be no additional charges, then they said I must lodge a complaint which I did, they said the branch manager will look at the case and come back to me, till today I haven't heard from them so I guess there won't attend my case.