Disappointing Customer Service

I visited the mall of Africa branch to purchase formal shirts for my husband. There was a special running of buy two shirts and get 30% off the cheapest. Unfortunately the store only had one of the specific shirts that I wanted to purchase.

I was redirected to the teller to place an online order. Waited for 10 minutes while the teller was trying to figure out every step of the online process. I was then told the order cannot be discounted as it is an online order. No where did it say that the special was in store purchases only. Even if it was in store only, why do your stores not have stock?? The teller checked at all other stores and every store had just one of the shirts available, How is a customer supposed to purchase based on the promotion if there is NO stock?

Really disappointed as I have not used my account card for almost a year and when I decide to use it, your store disappoints with no stock. The staff also need to be more helpful and efficient.