Steeling from customers

I app**** for a store/credit card about 2 years ago, and on that form, I added my banking details and requested that all money spent on the card gets debited from my account at the end of each month.<br> After about 9 months running from store to store just to try get this card that Woolworths had begged me to apply for, I finally got to use it. <br> 3 months later they said that I owe a certain amount on my card. I was not sure why as I had given them permission to debit my account for the full amount at end of each month.<br> Non the less, I had to go into the store and pay this amount ( including interest that should not be there if instructions were followed) and then re-sign forms to allow them to debit full amount as they had lost the previous forms.<br> Now, about 6 month down the line, I have been given another statement saying that my payments are overdue and that I owe money for the last couple month (including interest) once again.<br> Can't these people read? Don't they know how to follow instructions? Do I need to waste another day of my life standing in ques to sort this out?<br> I do not want to pay this interest again and I do Not want an account with this company anymore!!!