False marketing and incorrect information

I recieved a voucher stating clearly R7500 of any purchase in my statement being that i had a high credit limit i went to the cornubia edgars and upon completing my purchase i was told i would only be receiving a 50% voucher by the staff and managment who seemed confused i asked to call customer care and they advised me it was closed. I am utterly disgusted with edgars honesty in their policy as per the consumer right# 6 all marketing and correspondance should be fair and accurate. I had to pay an amount of R2694 on my account due to this it has been a very inconvenient experiance and i intend on crediting the items back i am very disapointed in edgars and will be closing my account i also intend on making a report in my local tabloid to make people aware of my experiance.