Humiliating - Account told to be active but not

On the 17th i app**** for a Mr Price account and it was approved, on the 17th and 18th i received an email to remind me to collect my card from a Mr Price store which i did yesterday at 17h00 at the Tablebay Branch - I signed all documents and received my card etc, i then asked the lady who assisted me if the account was now active and ready to purchase she rep**** by saying YES. Myself, husband and the kids went off into the store and approximately 40mins - 60mins we return to the cashier with all the clothes which we have now chosen to purchase on the account and the lady says to me but there is no credit on your account after ringing everything up - THIS WAS VERY embarrassing and humiliating as we standing at the till with loads of people behind us we were told that there is nothing they can do and that we have to leave all the items behind and come back tomorrow. This is totally unnaceptable. I want to be compensated for what has happened to us, it is very unprofessional and ********* the way this situation was handled.