Credit Card Blocked With No Explanation

I’m not happy with how I’m treated at Woolworths.My credit card got blocked last week Tuesday with notification or any explanation,I only found out about this when I was making a transaction on the card and it got declined.Upon phoning them I was asked to go to my nearest Woolworths financial services store and bring along my 3 months bank statement and copy of id for verification.I immediately went to Mega City branch as this happened while I was in this mall,even there I was made to stay on the line for over 2 hours with no help until I left and they said wfs will call me and no one called me on this day until on Thursday,someone called me to say they didn’t receive my statement,I asked if I can do another one and send it and I did,I called umlazi mega city store to find out about this and the lady said she did sent it-This was last week Thursday till today no one has called me or gotten back to me with any feedback and the card is still blocked.If I knew that Woolworths was this unprofessional I wouldn’t have taken a credit card with them.I’m so annoyed with this kind of poor service and I need this resolved asap