Failed efiling

My efiles for the Federal and State taxes were rejected and told me to file by mail which I did on April 4-5. I have received my state refund. I have received no word on the Federal. When I check the IRS web site, it doesn't show it as received or accepted...only that there is no information. I'm not sure what to do now. I there a number I can call to talk to a human? Should I refile? Will I now be penalized since it's past the filing date if they have no record of receiving it?  Any advice is appreciated.