Refund status issue

I live in Pennsylvania and I had to mail my federal tax return.  I mailed it on Feb 12th, and it is now April 13th.  We have not received the refund, checking the status on the IRS website shows no information, and I am unable to reach anyone at the IRS by phone.  Is there someone I can talk to in order to figure out if they got the return?  I don't care if it takes a while for them to send the refund, we just want to make sure that they got it and that it is on the list to be completed at some point.

 

Thank you