Overcharged Telkom invoice - no one at TELKOM can help!

I have recently signed up for the Telkom R599 fibre contract - unlimited home.

Telkom has send me 2 invoices so far:

1) Invoice date 09 April 18 amount R983.45 2) Invoice date 24 May 18 amount R906.35

Both invoices are way over the R599! I have spent the last 2 hours calling TELKOM and trying to get the problem solved. The billing department (phone no. 10210) referred me to the sales department (phone no. 10213). The sales department said they can not help I need to get back to the billing department. When phoning the billing department they say the sales department needs to solve the issue! It is incredible - I get the wrong invoices from TELKOM and they are not able to solve the problem at all! One department refers me to the other department! What does TELKOM now expect me to do....pay the overcharged bills.

I urgently need these overcharged invoices corrected!!! If I knew I would have this hassle with TELKOM I would have not signed up anyway!