Incredible Connection special revoked after purchase

On 12 October, I purchased a new Macbook Air M1 for the stated price of R15999 from INCREDIBLE CONNECTION (IC)at the Tygervalley branch in Cape Town. The tag next to the said laptop stated that there was a saving of R1000 and then under that was written 'R500 voucher'. I took a screenshot. The sales staff - at least 3 of them- explained that I would get the voucher after purchase and could spend it on an item in the store. The staff even mentioned some items I could buy such as a bag. I asked for my voucher once I had paid and then was told the voucher would arrive by email in about a week or more. I subsequently got an email from JDG buy&get at Incredible Connection informing me that I needed to send a copy of my ID, which I did. I then got another email informing me: 'Thank you for registering your recent purchase, unfortunately the product you purchased does not qualify as part of the promotion for the Buy and Get voucher.' I would like to know if anyone else has had this same experience. I will now contact the relevant department at IC to ensure that they honour their stated specials. I would also like them to explain what 'save R1000' means, because I do not see that there was a saving of R1000 in my purchase, as I paid R15 999.