No Reply. Since DS was in school today and deadline is Nov 1, I filed a formal casework with Senator Padilla's office. Based on the form, caseworks seem to be processed from his San Diego office. So if you're calling, maybe call there.
Since we're in NorCal I called his SF and Sacramento offices multiple times. No one answered, you get a machine with exactly the same recording. I left a message briefly describing the issue and my callback number. No one has called back yet - so I filed a casework. Just so they know we tried to find a resolution before the deadline. One recommender sent the LOR four times, the other sent two times starting from early October.