Misleading advertising

I was handed a Clicks Health specials pamphlet (valid 29 DEC to 19 JAN). I checked it out and marked off the things I need. I went to Clicks and was told these specials do not apply if they are paid for with Discovery Savings (MSA). On the front it says: \Helping you save and making your Medical Aid stretch further in 2016".<br> Nowhere does it state that the specials are not available on Medical Aid. Why am I as a Medical Aid member being discriminated against? It is just another form of payment. Clicks actually profits more from Medical Aid payment because anything is always more on Medical Aid. Please assist."""