Bad Service and No Transparency At All

Please take this as a pre complaint as I will be escalating this much further. I’ll try and be as brief as possible. On the 15th of June at 16:31pm I hired a class B car with the company and was said to be returned on the 19th of June 2018 at 16:31pm with a 30min grace period (time) and was to receive R2000 paid back to me. I arrived at the airport where the company is based, returned the car within the time period as per the footage will confirm. When I returned the car nothing was an issue in regards to car being late or being charged for any other costs implicated such as the ones mentioned by the manager at this point in time , the only complaint I had at the time was the attitude of the person receiving the car as he was abrupt and very condescending and had no way of speaking and addressing a customer. Fast forward I later did not get the payout of R2000 and was told by the manager that the car was late and they would not refund the full R2000 of which is not true as footage can prove that together with a customer care consultant that acknowledge that the car was sent in within due time her name is Lebohang Ramphisa of Customer Care Dept. Then Craig Petersen the manager further on tells me that the car was not booked for the day of return hence the amount being in shortfall . My question is then if the 19th of June was not a booked day and I had to pay extra , when then was I to return the car ? as I followed the instructed date of the return of the car and the time stipulated on the quote was adhered to . The conversation went on via email and had been receiving delayed emails since our communication started via this medium. The service is very appalling, disgusting, frustration and just pathetic there absolutely is no transparency in costing and pricing and since I have an employee who can confirm via footage that the car was returned on time and on date via telephone conversation that is recorded and email I will be taking this further