"Is that Seven Sevens Taxis? It's about your phone number..."
"Hello, is that Seven Sevens Taxis?"
"No, you've got the wrong number, sorry."
"But I dialled seven 7s and that's the name of the taxi company. They're called Seven Sevens. Available 24... seven. Have you heard of them?"
"Good, I'd like a taxi then, please."
"No, we're not Seven Sevens Taxis. You need to dial a different number for them."
"Oh. Do you know the number?"
"Yes, it's Seven 6s."
"Seven 6s? But they're called Seven Sevens. That doesn't make a lick of sense."
"Fucking tell me about it."