I've boycotted the local timber and hardware store. The previous owner was fabulous but the business was sold to a former builder.
I was doing a major reno and ordered over $15k worth of materials from them. When I got to the waterproofing stage I realised they had given me an inappropriate product, not what I had ordered, so I took it back. The owner, a jerk named Richie (beware middle aged men with diminutive names) was having a little pow wow with a group of young tradies and decided to demonstrate his masculinity by treating me like an idiot.
Firstly he denied the shit he'd given me was not right for the job, then said they didn't stock that brand anyway--it turned out he'd taken the opportunity to palm off an old product that was end of line. To prove this I had to go and rip the redundant price sticker off the shelf and wave it under his nose. Then he told me he wouldn't give me a refund or replacement unless I produced the receipt, then refused to go into his computer system to find my original invoice...all the while smirking and strutting in front of the young blokes. To their credit they were starting to look a bit uncomfortable. Then he starts up about how I wouldn't know what I was doing anyway and I should just go home and call a tradesman to finish the job. I flipped my shit.
I can't remember exactly what I said, but it seemed ripping the lid off the waterproofing compound and threatening to tip it over his head made an impression on him. The young blokes have departed enmasse and stood in the carpark looking through the door. By then he's threatening to call the police and I'm bellowing 'Why don't you call your mummy too, you useless pussy' and heading around the back of the counter. Hes shot out the other side and bolted for the carpark...Maybe not one of my finest moments.
Thing is, I was working in an environment where I talked to hundreds of people a day. I told anyone who would listen what a tosser he was. Being a dick has cost him $10k that I have spent elsewhere since then, and I know several other woman who won't shop there now either. People are horrible sometimes. There are ways to get even.