Apology
Subject line
It looks like something went wrong!
Body copy
Sorry about that, {!firstname_fix}!
It looks like something went wrong with [insert specific problem]. Our team [choose: is working
hard to fix it/has worked hard to fix it]!As a thank you for being such a great (and patient!) [choose: customer/client], I want to give
you this free [insert exclusive promotion].If you have any questions, please contact me by [insert contact information].
[insert your signature]