Debit order

I'm very disappointed with absa car financing department, from last month they didn't debit My account I had to call them to arrange payment, even this month they have done the same I called them, they lame explanation they giving me is unknown error when they debit. I called my bank to confirm. They said all its in order mybe they using different references. I don't want to get into unnecessary depth. Please Absa hire people who need jobs.