False advertising

I received an SMS from Edgars on 2/8/2018 which advised that if I qualify for a limit increase on my Edgars account I would qualify for 40% off my purchase when I spend R1,900 or more. This offer expired on 08th August 2018. A day before expiry I duly went to Sandton Edgars with 3 months banking statements and submitted them. Their system was down so they had to scan it via CNA. After wasting 1 1/2 hours waiting on the phone, and answering questions, they eventually advised they will phone me back. NOBODY phoned me back. After emailing their customer service, I was then told that they had phoned me back. What a blatant lie. They then advised I should go to Edgars Sandton and request the manager to give me this discount, I rep**** to them that since they messed up, they should arrange this as I wanted to avail myself of this discount. I was also advised that another agent will contact me (still waiting!!). This is obviously a FICA issue on this side, and want all required info, as I have had this account since 1997. What a farce.