This seems a pretty minor beef if you ask me, and it sounds like all you did was deal with the very first level of support.
Sure, it sounds like they didn't handle it perfectly, but I don't see anything egregious here so much as a situation where clearly you needed to step it up a bit and ask for a supervisor or something.
People really don't understand the basics of how to get support, which is interesting. I suppose it makes sense where the frequency of having to get support doesn't happen that often, but the simply basic rules are:
1. Follow through.
2. Be polite at all times, but be firm.
3. Be reasonable and fair.
4. Escalate when you don't get what you need within a reasonable period of time.
Follow that and you'll be fine.
BTW, I don't really think it's a great idea to post on the worlds largest photography forum bashing one of the top providers of camera gear either. Not that it would ever get back to you, but yeesh...