...but my perception is that it could be an indication of how customers are treated. If they're not willing to work with you, then they have a rigid and inflexible customer service policy, which is something I can't stand.
Your prorated argument is something I would have considered very reasonable and if I'd been the customer service rep, I would have either taken you up on that or talked to my supervisor saying, hey, this guy makes a great point. If I'd been the supervisor/had the power, I'd have granted it.