Horrible service , my money not fully refunded to me

Avis car rental in Port Elizabeth air port branch. On 22 November , I booked a car with them for a day, when I took the car out of the air port parking bay it was after 8 almost 9am, returned the following day on a Sunday, at 9: 27 , which was still within the turn around times, I have pictures proving that, as the security had written arrival time on the car, even that he didn’t capture the exact time, but that’s not an at this point. My reason for writing this review is the invoice I got after returning the car, they charged me for 2 days, upon receipt of this invoice I called, i explained my issue, i was informed that the manager will give me a call back after checking the cameras, which never happened, i then called again after two days, asking to speak to the manager, her name is Natasha, still i couldn’t speak to her I was told she is in a meeting , but she will call. Couple of days later I called again and spoke to Siphokazi, again i reiterated my complaint, she assured me that this is a non issue the manger will confirm times on camera and will revert to me, but I couldn’t speak to the manager as she was said to be busy wit audits, till this day 27 December 2025, my mney has not been fully refunded to me and no call back from the manager.