Bad Service from a brand that i thought would grow

I had hired a car from them on the 19th of December and wanted to use it while my one was being fixed. upon my arrival i was helped by a gentleman who took all my particulars and after taking the payment and did not advise of anything about the mileage usage of the car. This was for a white Micra which I had borrowed for the weekend. So I asked the guy when should i return the car and I was advised before 17:30 on a Monday which was 21st December. On the day i was returning the car i received a call from a lady called Sihle from PSS who asked me at 15:23 when was i coming to drop off the car and I advised her that I was actually on my way, comfortably as i was on my way and also told her that I was meant to bring it at 17:00- 17:30. She then advised me to drop off the key at the drop off box. I did that and the next day i received a call telling me that i have gone over the mileage of the car, i then lost it and advised her that i was never advised about the mileage and was not going to pay for something i was not made aware off. My deposit was 3000 of which they helped themselves and took 700 from me for exceeding something that was not explained to me at all and i still have proof that its not even mentioned on the sheet agreement that I had. I was so angry and frustrated and told them to deposit my money back and would not do business with them ever again. I hate everything that has to do with people that know they are on the wrong and still have an edacity to take R 700 from my money. I will never do business with them and have advised my friends and colleagues to not use their service.