payment arrears arrangement

my car its owing I tried to make arrangements they refused now they are threatening to take it or report it as a ****** vehicle, i got a call from the other lady who is hanling my account and when i try to make a payment arrangement she told me that she will report the car as a ****** car. and she hang up the phone i tried explaining to her that ive made R9000 payment she shout at me and say she's not taking that