DM Credentials Packet

I'm sure this has been discussed before, so apologies if this is a duplicate.

I made Diamond status three weeks ago today but still have not received my credentials in the mail. My wife received her gifted GM credentials yesterday (with cards valid until 2/14,) and I don't remember it taking this long to receive my GM or PM credentials last year.

Does anyone know how long it typically takes to receive the DM packet, and is there anyone I can speak to in case there was a mistake in mailing it out?

Thanks!