Woolworths credit card ****!!!

I closed my Woolworths credit card last year. I called them to confirm that the outstanding, which I paid according to advi*****t by the customer service agent. A few months later, I recieved a statement saying I owe another R32 or so. I called the call center to query and was told this was interest. Irate I paid this amount as well. I'm now receiving more statements saying I owe another R32!!! I sent an email and was told that only now the account was closed only it was closed before!!! My shock because I was told last year it was closed and even on the woolies app the account does not exist! I feel like this is a **** even! Even the agents assisting are not the most customer centric and eager to assist individuals. Woolworths please resolve this!