Debit order

Sick and tired of Telkom and its incompetence. I have two active debit orders with them, one they debit correctly and the other they don’t and so I pay it manually and then claim that I don’t pay my account. They claim that they don’t find any money, how is that possible when they are able to debit for the other account? Today they debited my account after I have already paid them. I’m going to block all my debit orders, you can backlist me I don’t care anymore. I spend more money rectifying this issue every now and then which I’m not compensated for!!!