Space lost after bootcamp fail This is my first apple computer (MacBook air 2015). I had to install windows on this because my school wanted it.

I tried installing through bootcamp and it failed the message was "windows support software could not be installed on targeted device" then it said it was removing the partition and for hours nothing happened. 

Then again opening bootcamp assistant the message was "The startup disk cannot be partitioned or restored to a single partition" 

My original storage was 128GB now it's 84GB, how can I get the rest back?

 $ diskutil list
/dev/disk0 (internal, physical):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      GUID_partition_scheme                        *121.3 GB   disk0
   1:                        EFI EFI                     209.7 MB   disk0s1
   2:                 Apple_APFS Container disk1         84.0 GB    disk0s2
/dev/disk1 (synthesized):
   #:                       TYPE NAME                    SIZE       IDENTIFIER
   0:      APFS Container Scheme -                      +84.0 GB    disk1
   1:                APFS Volume Macintosh HD            43.5 GB    disk1s1
   2:                APFS Volume Preboot                 44.8 MB    disk1s2
   3:                APFS Volume Recovery                517.0 MB   disk1s3
   4:                APFS Volume VM                      1.1 GB     disk1s4
$ diskutil cs list
No CoreStorage logical volume groups found


Also when I open disk utility
The problem was solved after running a command

diskutil apfs resizeContainer disk1 0g