I recently had a fairly similar experience with a big ben cambridge i won off of cigarbid.com. The drilling from the shank to the bowl was so far off center, it started at the top of the inside of the shank. Basically, the circle with the dot which marks where the drill is SUPPOSED to go at the end of the inside of the shank was completely untouched, as the drilling started well above that. It also had more than a couple little dings in it, the finish on it was crap, and there were a couple fills. Now, any of these things by themselves barring the drilling, i wouldn't have a problem and would have kept the pipe bc i got it for an absolute steal, but i didn't want to take the risk and have a crappy smoking pipe.
Being the third different pipe I have received from them and consequently returned because of fault with the pipe, i just told them to refund my money and i would refrain from ever ordering from them again. To their credit, the first two i had issues with were both stanwells that they replaced with no shipping charges and the replacements they sent are fine smokers.
I have another big ben (silhouette) i bought from my local b&m, and have no issues with that pipe and it smokes and looks great. If I were you, i'd return it and just get another pipe that passes a cleaner through easily. You paid your hard earned dollars for it, now they need to hold up there end and not give you a faulty product.