We guarantee 48 hour turn around times for tickets, and are generally much quicker than that. The person who submitted their billing ticket right before you expects their ticket to be answered in a timely fashion as well, after all. If you require near-immediate ticket responses you should probably get in touch with management to see if a custom SLA can be worked out. Otherwise, I'd imagine it to be only fair to handle tickets in the order in which they are received.
You should call our toll free number if you require immediate service, or you should contact management if you feel the service is not what is advertised or promised. I don't believe posting such issues here will really speed up the process unfortunately. It's quite rare for our billing department employees to actually browse these forums.