I don't believe the merchant got the funds from coinbase yet.  I've emailed them like franky1 suggested and will update this thread (with hopefully useful info).

Thanks

Hello,
I've tried to read how to cancel transactions but seem to find differing suggestions.  Seems like the restoring the wallet was the only one that made sense to me.  Here is my issue:

I sent BC to an address that expired before I could send (they give you 15 min, but I was too slow with my offline computer, blah blah).

Anyway, I broadcasted and now up to 9 confirmations - but the merchant emailed that the transaction expired (going through coinbase).

How do I cancel my transaction so I get my BC back?
Thank you!