Sorry to hear that your cron job is still not working. OpenCart has nothing to do with the cron job other than that you're running the cron job for the OpenCart site or using its data. Your cron job will need to have the correct syntax for running in a command line (as opposed to running the command over an internet browser). Your website is not hosted with us, so it makes it difficult to duplicate and check the issue here. If you continue to have problems running the command, then you will need to speak with your hosting support to see if they can identify any errors when running your command. Our operating environments may differ, so even if I could identify an issue here, it may not be the same where you are hosting your website.

Apologies that I can't give you a direct answer to resolve the issue.

Kindest regards,
Arnel C.