My DVD drive ate a disk

I have a brand new Optliplex 5070 with vertical DVD drive.  I am trying to install new software and inserted a disk.  Nothing happened and finally I opened the drive door and the disk was gone.  I tried repeatedly opening and closing the drive but the disk never appeared.  I disconnected the PC and held it upside down, etc. and the disk never showed up.  Peering into the tiny slot I cannot see the disk.  I inserted another disk but the PC does not recognize the drive at all. the drive does not show up on Explorer.  Any suggestions?  Thanks.