Deleted Windows Through DiskUtility, 100GB in "Free Space", Unable to Combine to Main Partition I deleted bootcamp with Disk Utility and now have lost 100GB of space that I can't recover.

macbook-pro:~ kevin$ diskutil list
/dev/disk0 (internal):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                         500.3 GB   disk0
   1:                        EFI EFI                     314.6 MB   disk0s1
   2:                 Apple_APFS Container disk1         389.0 GB   disk0s2

/dev/disk1 (synthesized):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      APFS Container Scheme -                      +389.0 GB   disk1
                                 Physical Store disk0s2
   1:                APFS Volume Macintosh HD            34.6 GB    disk1s1
   2:                APFS Volume Preboot                 45.0 MB    disk1s2
   3:                APFS Volume Recovery                1.0 GB     disk1s3
   4:                APFS Volume VM                      1.1 GB     disk1s4

/dev/disk2 (disk image):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:                            CCCOMA_X64FRE_EN-US... +4.7 GB     disk2

/dev/disk3 (external, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *1.0 TB     disk3
   1:                        EFI EFI                     209.7 MB   disk3s1
   2:                  Apple_HFS Kevin                   999.8 GB   disk3s2


I called apple and they had me wipe the HD clean, and reinstall the OS. It still hasn't fixed the problem, would appreciate some help!

Tried deleting the free space on disk utility but just get this error,


  An internal error has occurred and the disk for one of the specified
  operations could not be found. This may be a temporary issue, try
  again.
If you are using High Sierra and APFS. Try this.

Below command to find the list of Drives.

diskutil list


run this to retrieve the the free space.

diskutil apfs resizeContainer disk0s2 0


Now your unused free space will be added to your existing hard disk as a single partition.