Unnecessary Sundry items added to Account

In light of the interest rate increase at the end of December, the installments of my vehicle finance loan has changed. This added interest has been added into my installment over the remaining periods of the loan, which is correct. However, what Absa did was not only increase my installment to make up the increase in interest (which I'm fine with), but they also charged a sundry amount of R938.87 to my December account. So what this means is that they adding the amount of the interest upfront and also deducting it in my installment over the period of the loan.<br> This is absolutely pathetic and all I got from the service line was that it was not added meanwhile it clearly shows on my account. I am yet to have this corrected.