Very unprofessional, got a call from Mbd legal collection was threated if I don't pay amount R1500 I would be given a default judgement against me but I'm currentlt paying R300 a month so how can I get default judgement

Very unprofessional, got a call from Mbd legal collection was threated if I don't pay amount R1500 I would be given a default judgement against me but I'm currentlt paying R300 a month so how can I get default judgement. Plus the communication skills between all agnets is to be desired. As one get different information in what you can, they near make any not es for the next agnet that calls. They even make double what ever arrangements that was made with the last anget. Don't get me started on telephone ethic.... Plus the agent advised me to borrow money from family to pay, who gives them the right to give this advice. For a law firm allowing their consultates or call agents to speak to clients like they are garage.