Robbing me in broad daylight

This business is robbing clients, I literally owe them R370 that’s all I owe to be clear today they send me a msg saying that they giving me a final warning to pay R390 then I call them to enquire why they keep on putting charges onto my account I get through to an Alicia and she put the call down in my face I call the second time I speak to a Sandiswa and she do the same wasting and taking more of my money. If a customer is being ****** like this by a company then no one should buy there and company should close down.