Terrible experience

I had received an sms stating that my debit order will be on 23 December 2020, however my debit order is on the beginning of every month. The message was sent to me on 15 December 2020. I immediately contacted them from my mobile and stated that they must not debit as i will not have funds in that account. The agent stated to me that everything was done for the 2nd of January. On the 23 December 2020 they still debited me and i incurred reversal bank charges. I then contacted the call centre again and informed them of their mistake. They stated i must email them a copy of my statement. I asked them to reimburse me for my inconvenience especially my fuel, airtime and further bank charges as it was their fault but they refused. The agent then called the team leader and i was told the same thing while using my own airtime on the line. They then stated theyl have a manager contact me back but they haven't. These major companies want us to keep losing money. If it is the clients fault they have to make all payments so that they lose money but when its their fault they dont want to lose money. It is totally unfair and i want to be reimbursed for all my cost incurred as it is their fault.