Refuses to change dates

I have requested that my debit order date be changed 3 times but nothing as been done to date. Each time i speak to a new consultant they say that the system does not show any changes! I have never been able to speak to to management cause each time i ask i get put on hold! After the last debit order problem new \pending debit orders"on a closed loan appeared. I did ask the consultant what had happened and she said she cannot answer me and will not be able to tell when this will be sorted out. """