Incorrect billing from Telkom

I have a contract with Telkom. I've only noticed last month (August 2024) that my bill has been increasing since June 2024, as for the month of August and September my bill is three(3) times the agreed amount. On the 24th of August, Ms. N. Mkhize(call center agent) stated that Telkom is aware of the system error regarding subscriptions as it has affected most of their clients, she then escalated my query to her supervisor (Mr. C. Dladla). I've been trying to resolve this matter with Telkom without success. I believe that I have exhausted all avenues as I have called the customer care line multiple times, been to the branch in main street Johannesburg and sent an email both N. Mkhize and C Dladla. The issue still persists, and unreasonable amount is deducted from my account. I would appreciate it if Telkom would pay back the money that was deducted from my account that we did not agree on.