Took two J flights on MU in 12/25. Booked through AMEX, and used my DL number. Neither trip has been credited to my account, although I put in missing miles requests two weeks after each trip. Just wondering how I can contact Delta about this. Doesn't seem to be any way on the website except through messaging system--the AI phone hotline pretty much told me to do one. As you can probably tell, I'm an infrequent flyer with DL. Any advice would be appreciated. (I did look through the forums and the last thread was from 2019, so not sure how relevant that is).

As a data point, I had similar travel in 4/25 on MU J that wasn't credited to my account until 8/25. Has something similar happened to anyone else here? (Probably not as FT members are a more proactive bunch than to let it sit for 4 months).