Worst customer service ever

I opened a contract with Telkom beginning of June 2021, end of June 2021 I called helpline I was advised my first debit order will be at the end of July. I called on the 30th July 2021 I was advised I should call after the 1st August 2021. I called on the 4th August 2021 to find out why Telkom hasn't debited yet the lady had no information she said she will get back to me. Im still waiting for feedback on why the debit order did not go through. I received my statement and the balance is increasing. This will result in me owing Telkom a large amount that I wont be able to pay due to their incompetence. Can someone get back to me with feedback cause me calling your helpline doesn't help at all. I wouldn't be bothering my self with them not debiting but I foresee danger caused by Telkom on my credit record.