Unauthorized double debit order

I recently extended my service plan with Motorite(TS***) and it was successful, I was then advised that the first premium was going to be processed on the 1st of May, amount was only debited on the 3rd of May, but was told that the next premium was going to be aligned to my pay day date, which is on the 20th of May. On the 20th may no premium went off, so I waited for the 3rd of June to see if they were going to debit but debit order still did not go off.

I then called the contact center to tell them to debit my account, since the debit order did not go off, but the contact center agent assured me that my account was up to date and the debit order go off, even though I told her that the debit order didn't go off and that she was gonna also log a request to their admin department to inform them of my request. when the admin department came back, they also stated that my account is up to date.

This month on the 20th June, they double debited me , without my concern, and I'm highly upset that it's their fault that they didn't debit my account last month and because of this double debit order, it has left my account in a negative balance, that even one of my debits orders bounced. I want them to reverse the second debit order and send an apology for the mistake they did.

This below is an email I received from Hendry Mndebele, that logged a call to admin "Please be advised that our admin department has informed that the reason for double debit was not that the premiums was rejected but then they informed that the double debit was due to debit date change a double was raised for June and July" I asked him why I was not advised on the above before.