Game incorrect advertising

On 20 May we looked at fridges, we chose a model which cost R10999. We went home to figure out how we should pay for it. Since my husband is a pensioner we were excited to know we would be getting 10% discount as we receive sms’s every week almost advertising 10% off for pensioners on Wednesdays. When we went back to the store on the 9th of June we found that they not only put the same fridges price up with A R1000 but according to the Game store in Potchefstroom 10% of R12000 is R300. They said you only get 10% on the first R3000 but this was not mentioned in the ad. I did not even see a board in store mentioning this. Sadly the staff was also very rude and barely I acknowledged our existence. We ended up buying the same fridge ( newer model) at a different store for cheaper.