Exactly the same
Hello,
I have been through exactly the same you described (retained the original marriage certificate and pictures).
Couple of things I did
1) I contacted my local congressman, explaining to him the situation and provided him all the details like the visa application no, drop box no etc. and also gave him copies of my employment letter, marriage certificate etc to support the case and show him proof that there is no reason for delaying the visa. He was genuinely concerned and regretted that I had to go through this and offered to help and he did. He made an appropriate enquiry with chennai consulate and my wife received a letter within a week to send her passport and copies of 797 and my H1 petition. She received her visa by mail today after two months.
2) Wrote an email to the chennai consulate a few weeks ago. It is not recommended so I would leave it your judgment.
I am over with this adversity and pretty sure you will all very soon.
Good Luck