Woolworths bad customer service

I received an sms from woolworths that my account was handed over. I sent an email on 28 March regarding this because I never receive statements from woolworths so I do not know what I owe them or have to pay. They did not even answer me. So I sent them an email again on 16 April. Still no reply. I have proof of these mails. I received an sms again now. I am not even going to bother sending them an email again to arrange for payment because they do not reply. Now I have a bad credit record because of their bad administration. I demand a reply from woolworths and that they retract my account from being handed over as it is their own fault for not sending me statements.