I use Task scheduler to call my .bat file.
Try
C:\Program Files\PHP\v7.2.15\php.exe -f c:\inetpub\support\api\cron.php
note: mine is currently
C:\PHP\v7_3_6\php.exe -f c:\Inetpub\wwwroot\support\api\cron.php
(as you can see from my post back in Feb I upgraded PHP from 7.0.26 to 7.3.6)
What happens when you run it manually?
(ie type this in a command line)
C:\Program Files\PHP\v7.2.15\php.exe -f c:\inetpub\support\api\cron.php