Wrong debit order date.

I dont know how many times haei sent emails advising assupol to debit my account on the 20th of every month, I even filled out a form advising them to change the debit order date as they have wrong debit order date. My account is in arrears due to them debiting my account 5 days before I get paid. I honestly dont know what else to do for them to start debiting on the 20th of every month. I am extremely disappointed with their service, it really does leave a bad taste in one's mouth. I think I should close my account and give me back all my money, I will find myself another life policy