Highly dissapointed

I rented a car for my uncle on the 22nd of Dec he initially made a booking to come on the the 23rd but we went on the 22nd due to unforeseen circumstances , we rented the car and took it home on the 22nd of Dec 2017 at8:30 am and we did a pre authorisation on 5500 using my capitec credit card we were told the estimate of what we wld pay for the car is 3900 if we were to exceed the kilometres or anything like that bt our total cost was calculated to 3200 .

On the 3rd of Jan we returned the car at 10 am as started on the contract and the car was inspected and all was found in order so now we wait for Avis to take wat is due to them and for us to get the deposit on the 9th of January AVIS TOOK 4200 WHICH I rlly did not get when we went to the branch we were told that it is because we were supposed to return the car at 8:30 not at 10 so how we're we supposed to know that because on the contract it's written 10 am and we were told 10 am so after 8:30 the we got charged for another day . So oky now what we supposed to get back is apparently 1500 which should be on my credit card I call shortly after the 3rd to find out as to whn the funds will clear and I was told after 7 days and that did not happen I called everyday and the last tym I called spoke with Lwazi who told me he will call me bck with Feedback from your customer care thy never did , called again was told capitec says there ar no funds on hold so I must call capitec and find out what is happening I called capitec and I was told that Avis needs to refund me bec thy do not see the refund on their side I spoke with 5 different agents at capitec and they all told me they see the money avis took but can not see the surplus and I believe at capitec they deal with this all the time so they should know what to look for , I called Avis again and I was told capitec my sort out the problem for me and I did not get how because I had am agreement with them , I go to the branch where I rented the car and I was told I mist go to the head office in kempton park where am I supposed to get time for that I do not know because they did not understand what happened, did not get as to why some dis not ask maybe for my credit card statement to see if these funds did come to my account or not I do not know who is supposed to help me in this regard highly dissapointed