Wrong debit order date

I have requested on numerous occasions for my debit order to move to the 31st of every month as I have changed employment. You have managed to update it but you are still debiting on the 25th of every month. Every month I have Magtape unpaid as results of Iwyze sending a debit order on the 25 of every month Please update debit order date for the last day of every month. Otherwise, I wil have no choice but to switch this policy to other service providers.