Poor customer service

I have been paying my account online as i am trying to pay and close my woolies account. I have sent mails trying to find out what my outstanding balance on the account is, however todaty when i called the call centre, i was informed that my account had been handed over to someone in MBD in February this year without my knowledge. the call centre then provided me with a number to call and that contact number just rings continouslty. This is really poor service from Woolworths. I was not even contacted to say that when i was making payments, i was paying a lower amount than what i needed to pay.