Absa vehicle asset finance dissatisfaction

I have been an absa vehicle asset finance client for almost 3 years. I have never missed any payments but i woke up this morning to a shocking sms saying i missed my payment these month of which they already debited on the 15.i even made an arrangement to pay more than my instalment amount and its not even making a difference because they are reducing with 1 month. I called and the consultant just told me she doesn't understand what might be the problem coz in her system its also showing my account being in arrears Im soo disappointed. Im even considering taking my car finance to standard bank because wooooow its bad