The man wanted a complete overhaul. Going in and telling the shop owner that you want the bike ready in 2 hours is unrealistic since they in all likelyhood haven't even touched the bike. With that attitude you might as well just go in and get the bike and move on. Maybe the owner is unaware of the problem, who knows. You only have two options at this point. One, either trying to salvage this mess, or two going in mad and getting your bike back and waisting five weeks. Maybe the owner will try to rectify and appease the customer for the delay and the lies. I mean you can always just say, "Give me my damn bike back now, you guys suck".