bad service

Towards month end September I called the Miway call center to request them to change my debit order date to the 15th of every month since my payment dates have changed. Fine the lady said there is no problem they will change it. Fast forward the 15 October no money is debited from my account until I decided to call the call center. After 3 days of struggling to go through I get told that my insurance is cancelled without any notification because they debited money from a wrong account that is closed. I found this very unfair , why didnt I get notified that my insurance is cancelled. Is it another way of trying to ******* money from me because I have been paying for a year without claiming because now I am told that my cover is going to start from scratch. THIS IS ******* AT ITS BEST