Kate, I'm sorry that happened, but I think it's pretty funny that he's throwing it in your face already. That made me laugh, it sounds like my FH.
If it makes you feel any better, I got my FH's ring online, and when they sent it to me (last Friday and I leave on Wednesday), they had totally forgotten to engrave it. I was P-I-double S-E-D. I called them and they were like, "oh, well, sorry. Send it back to us after the wedding."