Unable to get fault and billing query resolved.

I have signed up for a Telkom uncapped Internet Fibre 10Mbps for 24 months for the cost of R800. However, when I look at my monthly bill I saw R828.

In addition to this, the fiber line is behaving weirdly, sometimes certain sites like Google do not work while other sites such as Yahoo does work.

I'm trying to reach them via 10210 but I just keep getting redirected so there is nowhere I can log my fault. Even the mobile app does not allow me to log a fault on my fiber line.