I'd say you've been more than patient with them, Bud. I'd just show up at the LBS.
"Hi, I'm here to pick up my bike."
"I'm sorry, sir, but it's not ready yet, just give us a few more days, yada, yada, yada."
"My bike, I'm here to pick it up. Please bring it out. Thank you."
(Translation-"End of conversation. Yes, I am being completely unreasonable, and am about to get rude. The fastest way you are going to get rid of me is with my bike in my hands.")