After you file

I had to mail mine due to not reviving the ip pin. I mailed mine on March 28th and put tracking on it. They recieved it April 1st. I checked wmr on Apr 15 and said they recieved it and its processing. I opted for direct deposit now just a few days ago when I check wmr ny bars went away and it says we are still processing your refund. A refund date will be provided when available. What happened?!?!?