Hey.! This is Rameena with over 5 years of professional experience in Facebook API, HTML, Javascript, Open Cart, PHP and have done a lot of jobs before, I have also a large portfolio of similar projects. So feel free to assign this task to me, I will be the best choice for you.
I will build the Opencart Messenger abandonment cart module with the same functionality of a particular plugin in the URL which you quoted, I will do it on time with high-quality work.
Message me, I am available to start work at any time.
Waiting for your positive response.
Thank You.!