Debit orders despite canceling policy

I'm so frustrated with Miway when it comes to cancellations! I cancelled my policy last week and got debited two days after, l have no idea for what reason. Needless to say l reversed the debit order and incurred a bank charge for this! Today l get an sms that my premium didn't go through and l will be debited soon! Smh. Why am l still being debited when l canceled my policy? It's unacceptable, please Miway get your act together and fix this.