Refund being held

I filed my taxes in February. I received my state refund the end of February with no problems. My federal ones I still haven’t received. My transcript state they were received February 4. But it states on March 11 a 570, or additional account action pending. On March 18, a notice was issued. I never received the notice and there isn’t one listed in my account but according to an agent, it said my account is being held for further review. I haven’t heard anything since. The date listed on my transcript next to codes 766, 806 and 768 state April 15, 2024. Does this mean it will be finished on April 15 or am I still just waiting? I reached out to the tax payer advocates office and they refused to help. They said they aren’t accepting cases from people who have 570 on this year’s tax return. I’m facing hardships and need that money.  I’m a teacher and don’t make that much annually so for them to flag my account, doesn’t make sense. Anyone have any ideas as to when this might get resolved or anything I can do?