Oh, I love the Better Business Bureau threats. For it to matter, the business needs to be BBB-accredited. I've worked in a small shop where a cus-dumber tried to use that against us, and my boss laughed in his face.
I think they still record complaints even if its not accredited. But it still wouldn't mean anything, because anyone can make anything up, and the business is under no obligation to respond to those complaints.
Also, Better Business Bureau works a lot better with bigger, more well-known businesses. I highly doubt one complaint against a local mom-n-pop shop in some podunk town is gonna do anything.