Money back asap

I pay my monthly policy on the 15th of every month, and twice now MiWay has debited my account before the dates. Not because pay day falls before the 15th but because they think they can whatever they want with my money. I want my money back today. The 15th is on Tuesday, the money that was debited has its uses and now it's gone. I want it now and somaar cancel this whole freak show.