Extreme Disappointing Customer Service

It's unfortunate that I find myself having to complain about Herts Car rental in Bloemfontein Airport. On Friday the 7th of June I Made an enquiry for booking VW 8 seater for the 15th of JUNE, I was helped by Ntlhaki Molete. She quoted us and emailed me the quote did not say anything about booking the car. I was told to just go on the day to get the car with relevant documentation. We decided to go to the their Airport branch because on the quotation the address that appeared there was the airport one, only to find out when we got there we were supposed to go to have gone to to the other branch in town. We were assisted anyway but we were told that the company has no VW but the Merc 8 seater which was ok with us. We filled in all paperwork and submitted all relevant documents. On Friday, 14th June 2019, round about 7pm I received a call from Hertz and I was told that me and the Co driver our credit score was below 650 so they cannot give us a car. I then rep**** by asking the person, you calling me at this time when I'm supposed to come fetch the next day what am I supposed to do? He told me he doesn't know he is just doing his Job. Fair enough, I then asked whether or not there was any alternative? He said no, there and then after hanging up, I called my gals to let them know... Now we need to call other car rentals to hear if they cannot assist us as Herts has disappointed us. We finally got a promise and ended up going there that very evening only to find out that the company is next to Hertz. While I was busy filling in all information with this other car rental one of my friends went to Hertz to hear what was really the problem, she was told that there was no problem they just canceled the quote we got from the other branch and the Mercedes they offered us they were changing to the original car we wanted which was VW 8 seater???? now my friend is surprised to hear this, she then asks this guy when were you going to tell us all this? He boldly responded by saying "tomorrow morning when you all get here, we would see how we could assist you, as you can see I am busy processing Ntsoaki paperwork on our system" what is that? Is this how people run other people's companies? Making customers go to other companies than of your own? I personally wanted to speak to the management as I deal with customer service at my work place, I know customers policies and rights, employees right and employer rights I did not have anything more to say to the employee but to the manager. To this very moment I still don't know why we were never assisted properly was it because we were quoted from the other branch? Because of the credit score? Or because we were just undermined as woman?????