I applied on April 15; my refund is "accepted" not "approved". When I called them, TurboTax has no record of my SSN, but IRS says it's processing. What should I do?

I applied for my tax refund on April 15, and my refund is still at the "refund accepted" stage. My friends who filed on the same date have already received their refunds, but mine hasn't even reached the "refund approved" stage. When I called TurboTax, they said there is no record of my filing with this SSN, but the IRS said it is still processing.