You should try again and ask for Original Routing Credit (ORC) since this was an issue out of your control. Delta has been good to me about giving credit for similar issues (KL rebooked to LH, KE rebooked to OZ) but you need to remind them that they rebooked it for you and that it was due to a tech issue with VA. You might be able to call Delta and get them to fix it, the phone staff have always been able to fix issues like that for me, but then again I've almost always been a Platinum so YMMV.
Good Luck!
Last edited by ttuna3; May 2, 2018 at 8:09 am
Reason: typo