Very bad my debit-order normally goes off every last day of the month but this time they decided to debit on the 3rd I don't know why and who gave them authority and I had asked to change banking details from there consultant who didn't bother to do that

Very bad my debit-order normally goes off every last day of the month but this time they decided to debit on the 3rd I don't know why and who gave them authority and I had asked to change banking details from there consultant who didn't bother to do that as they debited the old account that don't have a authority to do that when I want my refund no one is saying anything. This matter is not taken serious my banking details were only updated on the 4th when I called the call center worst service ever. All I want is my money back no back and forth