After you file

I updated my direct deposit info with the IRS on April 15th. Ever since the GMP has said the same thing " 

You are eligible for the payment. Once we have your payment date, we will update this page." And shows the last 4 of my bank account as the way they will pay us. Today is May 1 and we still have not received our payment. I do not understand what is going on. Can anyone give me answers please!