Discovery Insure purposefully left me without insurance on the road.

My discovery insure cover on my 3 vehicles and household content commenced on the 14th of Dec 2021 and the consultant I spoke to on the 1st of December 2021 told me that I will be debited on that date (14 December 2021) knowing that the normal debit date is the 25th of every thereafter. To my surprise, I got an email on the 30th of December 2021 saying my plan had lapsed because of a missed premium. When I went to check on my bank statement I noticed that they did not debit on the 14th as they had said, instead they attempted to double debit me on the 25th. Now, for the 25th I had made sure that there are enough funds for one debit, because even a few days before the 25th I got an sms from Discovery reminding me about my debit order for the 25th (which was the amount I know that needs to be debited). So now how do you say you debiting on the 14th, then send an sms before the 25th for a specific amount only to debit more than that, Basically I was **** to, on both occasions and to think the only reason why I even switched to Discovery is because of the great service I receive on my other Discovery products.