Bad service at Burgersfort

Good day On the 25th of November, I went to my local boxer in Burgersfort, near kfc, I got there around 7am ,I wanted to buy the surf powder soap,as iv seen it doing rounds that it will be R200, with a fine print stating 3 deals per customer. When I got to the store the manager Glen who was rude said that they are only allowed to sell 1 deal per customer,i even showed him the advert as i had it on my phone. But no he did not pitch,still refused. So I took it as false advertising. Please assist me further as it was only a 1 day deal and I couldn't get what I went there for. Thank you Thapelo ***