Debit order arrangement

Hi

I sent an email to Toyota Finance to change the banking details and debit order date. Only to find out that they have change banking detail but not the date. Since July 2017 i have been told that my account is in arrears and they haven't changed the debit date. I am really tired of Toyota Finance they can take their car if they want. I would understand if i was running away, i am the one who sent the email and requested them to deduct on the 5th of every month.

Please resolve this matter as soon as possible.