Pathetic Customer Service - Billing query

My monthly debit did not go off due to insufficient funds in my account, so i contacted telkom just to check if i can make a payment arrangement for next month. if not i would just make a manual payment. This is a transcript of the chat.

Welcome to the Telkom Chat service. One of our friendly agents will assist you shortly.

Please hold for the next available Agent.

You are currently being assisted by Mduduzi Ndlovu

2:33:50 PMMduduzi: Thank you for contacting Telkom, you are chatting to Mduduzi how may I assist you?

2:34:08 PM You: hi

2:34:27 PM You: i need assistance with my billing

2:34:49 PM You: there was not enough money in my account when you guys debited my account

2:34:59 PM You: i would like to set up a double debit for next month

2:35:18 PMMduduzi: Thank you for the enquiry Yaaisen.

2:35:49 PMMduduzi: Please note that we cannot send a request for you to be debited again.

2:36:04 PMMduduzi: I will request you to make a manual payment.

2:36:18 PM You: so you cannot double debit my account next month

2:36:22 PM You: ?

2:36:32 PMMduduzi: Banking Details: ABSA- ********** 598 Branch code- 632005 REF- 19 digits found in your Telkom Bill

2:36:56 PM You: is it possible to make a payment arrangement for next month?

2:37:16 PMMduduzi: We can send you info to debt collectors.

2:37:29 PM You: huh?

2:37:43 PM You: are you threatening me?