Fradulent behaviour by Woolworths

I had a Woolworths store account , that i closed in September and i spoke to an agent on the phone who confirmed that the account was closed and i will receive confirmation email, i didn't receive any confirmation email , however what i didn't expect was that a credit card application will be done for me , without my consent , this is so my credit profile which obviously affected, i have written emails and i have not received satisfactory answer as to who did this and why they did it