To be honest, I would just delete it out again, I am not one for sending angry emails.
And I am DAMN sure they should make sure they will get it out when they say they will. Remember it is them that tell us dates, not us that make them up.
But those are Real-Life friends of mine, and I really don't feel like adding people that I don't know unless they could help me collecting trophies … but I still delete them afterwards anyways.