Please provide a sample of your cron code so we can determine the issue, if possible please check if there are any errors or warnings from your PHP log to see if all parts of your code is executed correctly.
I have been a software developer for around 7 years now, I have previously worked as a developer of administrative websites for private companies developed with languages such as PHP, Javascript, CSS, HTML5, MySQL, and more. I currently work as a freelance Wordpress developer making custom themes and plugins as well as modifications on various aspects of the website. Feel free to send me a message so we can discuss further details. Thanks.