Very disappointed in NFC. and their staff is well trained to mistreat clients

I am deeply disappointed in NFC. I was approved as a contractor a year ago, this year end of January my contract was not renewed but fortunately I managed to get a permanent role beginning of march. This company refuses to make payment arrangements for 1 installment, they fetch the car before the 6th of March, Charge me R3000 for collecting the car. They now expecting me to pay 21K to get my car back. 1stly what transpired is nowhere to be found on the contract. They've debited 1 month rental so far (Without me having the car in my possession). Why are we treated so bad though? So basically I'm expected to pay up all that without even using the car, No one has ever taken so much advantage, its bad.I DONT WANT YOUR CAR ANYMORE. I can only afford to pay the outstanding funds in installments. I want nothing to do with NFC