Increased settlement amount

I wrote an email to absa vehicle finance enquiring about my settlement amount that has increased. I still haven't received a response up to date. The settlement amount the first gave me was R207024.24 and it's the same as the one that appears on my bank statement. Now the settlement amount is R208523.03 and when I ask for an explanation for the increase as it doesn't make sense to me no one can explain. I would like this matter to be addressed as soon as possible.