Office Depot review: office depot cancels order without good explanation

I bought 2 small cases of paper (5 reams per case) with a coupon code online and had selected to pick it up in store. The paper was on sale and so the coupon code made it a very good deal. When I went to pick up the order in store, I was told that the manager had cancelled the order. I received no email (and still haven't days later) saying the order was cancelled. I was offered to buy it at the sale price, which wouldn't really make it worth buying as other office supply stores had comparable or better deals. I was also struck by the way the situation was handled when I went to the store. The man behind the counter at the Orders/Pickup area looked at the order and then called somebody (presumably a manager) and then walked to the middle of the store without explanation. He was looking at someone in the back of the store, nodding as if getting instructions (he was wearing a bluetooth headset) and then walked back over to me to tell me my order was cancelled because I couldn't use the coupon code. I left the store without pursuing it further as I didn't detect that there was much effort at customer satisfaction at this store.

My thoughts are that if an order processes online with a coupon code, it should be honored. If you spend your time going into a store to have a manager arbitrarily cancel an order, I don't feel like it is worthwhile to have a business relationship with that store, and possibly that company, anymore. Being a manger of a company, I buy a lot of office supplies and obviously get excited to get a good deal on something now and then. Getting excited about a deal makes me want to shop at the same store again and again to see what other deals I might run into, while also buying things at normal price. I really do wonder what a company, or store manager, is thinking in creating such a rift with a customer as to just cancel an order and not even bother to try to smooth out the reason why. I will never shop at that store again as there are way to many other office supply stores that have policies that are more geared to my liking.