Very disappointed by Woolworths store card services

I have a Woolworths store account. I have been making payment to the account on a monthly basis through my bank app with all prove of payment saved. Currently I am receiving calls and SMS's from MBD Woolworths indicating that my account is handed over. I have the number listed there in the SMS and firstly the person therein cannot indicate how much am I supposed to pay to Woolworths. I called Woolworths and no one there can help as to how much am I owing and also no one can tell how much was paid as per the records. Woolworths is taking me from pillar to post with no help. I have all my proof of payments for the amount deposited via EFT to Woolworths account.