Terrible service from Telkom

I have recently incurred an unpaid debit order due to Telkom debiting on the incorrect date. For 5 years they debited on the correct date as per the contract only to find in April 2025 they debit without prior notification. I have sent an email for this to be rectified but no response, I tried calling but I can never get through to anyone. Now I receive an sms stating I will be listed on the credit bureau. Absolute madness! When they have not contacted me about the prior debit on the incorrect date! I requested a call back and nobody called.