CoCT Additional Charges

On the city of Cape Town website, I access my open invoices and every month there's an "Additional Charges" amount of close to R400. You can't view the breakdown of this amount, you can't see what it entails. I'm paid up every month so it's not a shortfall value. I've tried emailing the accounts team but I've been blocked by their mail flow after 2 attempts. Someone has gone out of their way to block me. Every month I'm being ****med by this Additional Charges that can't be explained and there's no way to contact anyone to find answers. This city is falling apart and I'm being ****** while it happens