No one wants to help with the mess up made

I requested In October for my debit order to be changed and it was changed as the debit order went off the next month from the right account. Last month my debit order got debited from the old account again, now I am in arrears. When I called in no one can help me, I would like urgent assistance to this matter. <div><br></div><div><em>(Supplier name changed from Momentum to Metropolitan Life by Hellopeter.com)</em></div>