Untehical business practise

Telkom SA has increased the monthly payment of my optic fiber at home from August 2022 without my agreement. I tried to phone to resolve this issue speaking with 3 different departments (081180; 10210 & 10213) all referring me to another department (on the calls for more than an hour) with no resolution or answer. As far as I am concerned increasing a customer's monthly payment without consent represents ********* business practice. I am highly frustrated with Telkom's incompetency and poor customer service. I hope someone senior from Telkom will phone me back to sort out this mess.