Originally Posted by
Ti-tillIdie
I went to the bike shop and talked it out this evening (I was a pleasant as I could possibly be) and had given Santana a call before I went (who were very helpful) and the resolution is that the bike shop will be working with Santana to replace the top tube. In the future, before I drop my bike off at a shop I haven't used before, I might place some masking tape with a "don't clamp here" note on it.
Given the circumstances that's a very good outcome. You obviously handled this well and the bike shop seems to be owned by a stand up individual. Hopefully, you won't be out your tandem ride for too long.