Bring back my machine

Hello my name is Johanna Skosana we have a problem we bought a washing machine at Astra furniture and we finished paying it and it got broken so we called them.they took it to fix it but just because we payed half money for the TV that we still owe they have not return the machine they say we have to pay the TV 1st ..so our problem is we don't understand why they are holding the machine that we have finished paying for the TV that we payed the installment but not the Chargers for please help