Debit order not collected

I received an sms from Miway saying “MiWay did not receive your premium. You have no cover for period 31/12 - 30/01. A missed premium fee of R500 for any non-payment after this one will be deducted when you have a valid claim. New terms and conditions of cover have been e-mailed to you. Ref#: P ********** 7”....My question would be....why would that be?? Because Miway decided not to debit my account??I’ve had money in my account the whole December it’s not like my debit order bounced?? I recommend that you debit my account again or send me your banking details, all my other debit orders went off besides the Miway one, and there is no way it would have bounced, so do the right thing,either debit my account or send me your banking details...