Poor customer service

The person did not want to listen to my difficulty but was forcing payment methods on me. He was going to reverse an amount deducted without my knowledge from my account which has caused me to end up in dire problems and when I told him I will start paying him next month he insisted I start this month. On explaining to him that I cannot afford the instalment this month as I could not afford it due to missed debit orders inflicted by FNB he threatened to not reverse the monies. I subsequently told him to do what he wants and when I go to SA next week I am going into a branch and seek help.