Disgusting "service"!!!

Disgusting customer service. So my debit order bounced on 31 January and i was not aware. I suffer from a relaxed attitude and don't worry about things if i don't know about it. I received the first notice yesterday, Tuesday, 13 February at 15:55; a SMS advising that my account is in arrears by R803.14 and that i must arrange immediate payment to avoid suspension. At 16:24, having stopped the car, i call 10210 and make arrangements, telling the nice lady that i will EFT as soon as i sit down at home, which she acknowledges. Payment was completed at 19:45. Today; at 14:59 i receive email from nudebt collections talking ******* about numerous written and telephonic requests for payment from their client. I have not received a single email or letter in the 14 days since my debit order failed and i would love to see their proof. Called call center(10210) at 18:17 today and was told that my account was apparently handed over on the 07th February. This relationship is on the rocks after over 15 years. What kind of people are running this trainwreck?