Loan arrears

Hi capitec Bank. I am very unhappy I have never missed any payment on my loan account, pay less amount or make late payment. I have made sure I pay more than what I'm supposed to pay and I make early payment but today I woke up to my account in arrears of 5400. Yesterday around 11pm 5400 was debited from my account and to my surprise nothing has changed on my statement, I'm still in arrears of 5400 and I'm still expected to pay 5900 according my loan statement. As per our loan agreement I'm expected to pay 5999 every month but I pay almost 10k every month because I wanted to pay the loan faster but still my account is in arrears. You're ruining my credit score, you're behaving e like a loan shark what you're doing is unacceptable. And 5400 amount that was debited does not appear on the statement you're a ****. I have never missed any payment nor make any late payment or pay less amount so what are arrears for. And the 5400 that was deducted what was it for because nothing has changed on my statement.