McDonald’s. In 4th grade my class got to go bowling and we stopped at Maccas. I ordered a McFlurry and some other shit. Threw my receipt away. No McFlurry. They didn’t believe me. 20+ years later I still hold a grudge.
Pizza Pizza. My dad was once in change of ordering pizza for a company lunch, and Pizza Pizza cancelled his order without notifying him, leaving him with a roomful of hungry people. When he phoned to ask for an update on the order, they blamed him for not calling to confirm an order he had already placed.
It was probably just that one franchise that was poorly run, but we've tried to avoid the company ever since. I think I've bought pizza from them maybe twice in my life.
Gillette because I vaguely remember some preachy anti-men advert they did years ago. Just left a bad taste in my mouth, so I don't do business with them.
I haven't gone to Pizza Delight (a chain in Atlantic Canada) in over ten years.
I went there as a teenager with my improv troupe and I received my meal over twenty minutes after everyone else had received their dessert. I was offered the opportunity to add a salad to my meal for a 50% discount, which I refused.
Now I understand that stuff happens sometimes, the service industry is hectic and I really didn't mind the screw up that much. The only reason I don't go there anymore is that the waitress never even apologized. (Also they're overpriced, not that good, and they got rid of the bread toasting station which was the only reason anyone wanted to go there in the first place)