Email Subject Line not sending properly

I have developed a PHP script that uses RabbitMQ to send emails. The script is functioning properly, except for the subject line, which is displaying the old subject instead of the current one. Make sure to add “Rabbit” at the top to cosider your bid. I am seeking assistance from someone experienced in PHPMailer and RabbitMQ to address this issue. The project should be completed within one hour, and my budget for this task is Rs 300.