Never running a debit order

I have had my contract with Telkom mobile for two months now, The first month my debit order never ran because they captured my bank account details incorrectly. I received an SMS telling me I am late and they are going to suspend my line. I called and had to make a manual payment. I did that. It is the second month now and my debit order still didn't run, same issue due to me being a bad payer they are suspending my line. This is unacceptable due to me signing a debit order for issues like this to not happen. Hopefully they will run my debit order next month. Sick and tired of me getting blamed for them not doing their jobs.